diff --git a/openscad/own/supermicro_sc808t/ssd-diskshelf_slider/IMG/disk-slider_end_assembly.png b/openscad/own/supermicro_sc808t/ssd-diskshelf_slider/IMG/disk-slider_end_assembly.png
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diff --git a/openscad/own/supermicro_sc808t/ssd-diskshelf_slider/STL/iteration_3/disk-slider_end_full.stl b/openscad/own/supermicro_sc808t/ssd-diskshelf_slider/STL/iteration_3/disk-slider_end_full.stl
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diff --git a/openscad/own/supermicro_sc808t/ssd-diskshelf_slider/disk-slider_POC-redesign.scad b/openscad/own/supermicro_sc808t/ssd-diskshelf_slider/disk-slider_POC-redesign.scad
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--- /dev/null
+++ b/openscad/own/supermicro_sc808t/ssd-diskshelf_slider/disk-slider_POC-redesign.scad
@@ -0,0 +1,273 @@
+// supermicro SC808 (and others) extended slider drawers to re-utilize 3.5"-hdd-cages for multiple 2.5" ssds
+// by zeus - 2023-06-15 - CC-BY-NC-SA-4.0 - https://git.kostianix.de/zeus/3d-stuff/openscad/own/supermicro_sc808t/
+// #####################################
+$fn=50;
+q=0.01;
+Q=1;
+slack=0.5;
+mt=2;
+layer=0.5;    // layer height of the 3d-printer to archieve some very narrow walls or floors without strange rounding errors
+rod_hole_dia=4.5; // with some slack for m4 threaded bolts
+slide_base_hole_dia=4; // 4.0 for m3 short inserts from cnc-kitchen
+disk_w=72;  // real measurement more like 69.9
+disk_l=102;  // real measurement more like 100.4/101 (connector overhang). effective length with cables at least 125mm!
+disk_h=7.25;  // unfortunately this is not really standardized. most relevant ssds will have 6.74-7.1mm thickness
+
+//slider-vars
+slide_base_l=130;
+slide_base_w=82.5;
+slide_base_h=12;
+slide_top_h=12;
+slide_wall_t=10;
+slide_bottom_t=3.3; // for m3 short inserts from cnc-kitchen at least 3mm is needed, regular is 5.7mm
+slide_wall_hole_dia=slide_base_hole_dia; // same as bottom to accomodate same inserts
+slide_wall_hole_t=3; // minimal distance of 3mm, because space is tight here
+slide_wall_z_offset=5;      // distance from bottom
+slide_channel_w=17.5;
+// supermicro 3.5"-hdd-drawer mockup for reference
+draw_w_inner=101;
+draw_l_inner=150; // slightly less in reality, but non-critical dimension
+draw_h_inner=21; // from bottom upwards
+draw_w_front=107.5;
+draw_l_front=31.5;
+draw_h_front=27;
+draw_t_outer=(draw_w_front-draw_w_inner)/2; //thickness of the rails
+draw_hole_h=6.5; // height of the center of the mounting hole (from the bottom)
+draw_hole_dia=slide_base_hole_dia;
+draw_hole_y1=19; // distance of first sidehole (from front)
+draw_hole_y2=79;
+draw_hole_y3=121;
+
+filler_w=draw_w_inner-slide_base_w-slack;
+flange_d=1;
+flange_h=3;
+post_h=4;
+link1_l=slide_base_w/2;
+link2_l=slide_base_w-(slide_base_hole_dia*3.4);
+// #####################################
+module drawer_mockup(){
+    color("brown")translate([0,draw_l_front/2,draw_h_front/2])cube([draw_w_front,draw_l_front,draw_h_front],center=true);
+    difference(){
+        color("brown")translate([0,draw_l_front+draw_l_inner/2,draw_h_inner/2])cube([draw_w_inner+(2*draw_t_outer),draw_l_inner,draw_h_inner],center=true);
+        translate([0,draw_l_front+draw_l_inner/2,draw_h_inner/2])cube([draw_w_inner,draw_l_inner+q,draw_h_inner+q],center=true);
+        // hdd mounting-holes
+        for(x=[-(draw_w_front/2-draw_t_outer/2),(draw_w_front/2-draw_t_outer/2)],y=[draw_hole_y1,draw_hole_y2,draw_hole_y3]){
+            translate([x,draw_l_front+y,draw_hole_h])rotate([0,90,0])cylinder(h=draw_t_outer+q,r=draw_hole_dia/2,center=true);
+        }
+    }
+}
+module disk_mockup(){
+    color("teal")translate([0,0,disk_h/2])cube([disk_w,disk_l,disk_h],center=true);
+}
+
+module slider_base(){
+    translate([0,slide_base_l/2,slide_base_h/2]){
+        difference(){
+            cube([slide_base_w,slide_base_l,slide_base_h],center=true);
+            translate([0,0,slide_bottom_t/2+q])cube([slide_base_w-(2*slide_wall_t),slide_base_l+q,slide_base_h-slide_bottom_t],center=true);
+            for(x=[-(slide_base_w/2-slide_wall_t/2),(slide_base_w/2-slide_wall_t/2)], // used for M4-rods
+                x2=[-slide_channel_w/2:1:slide_channel_w/2], // center cable channel
+                x3=[-(slide_base_w/3+slide_base_w/5)/2,(slide_base_w/3+slide_base_w/5)/2]){ // offset cable channels
+                // M4-Rod-Holes for connecting the trays
+                translate([x,0,-slide_base_h/2+slide_bottom_t/2+rod_hole_dia/2]){
+                    rotate([90,0,0])cylinder(h=slide_base_l+q,r=rod_hole_dia/2,center=true);
+                }
+                // center cable-channel cutout
+                hull(){
+                    translate([x2,0,-slide_base_h/2+slide_bottom_t/3+rod_hole_dia/2]){
+                        rotate([90,0,0])cylinder(h=slide_base_l+q,r=rod_hole_dia/2,center=true);
+                        }
+                }
+                // offset cable channel cutouts
+                translate([x3,0,-slide_base_h/2+slide_bottom_t/3+rod_hole_dia/2]){
+                    rotate([90,0,0])cylinder(h=slide_base_l+q,r=rod_hole_dia/2,center=true);
+                }
+            }
+            // base bottom mounting holes
+            for(x=[-slide_base_w/3,-slide_base_w/5,+slide_base_w/3,+slide_base_w/5],y=[-slide_base_l/2.5,-slide_base_l/7.5,+slide_base_l/2.5,+slide_base_l/7.5]){
+                translate([x,y,-(slide_base_h/2)+(slide_bottom_t/2)]){
+                cylinder(h=slide_bottom_t+Q,r=slide_base_hole_dia/2,center=true);
+                }
+            }
+            // mounting holes on top of the walls
+            for(x=[-(slide_base_w/2-slide_wall_t/2),(slide_base_w/2-slide_wall_t/2)],y=[-(slide_base_l/2-slide_wall_t/2),(slide_base_l/2-slide_wall_t/2)]){
+                translate([x,y,(slide_base_h/2)-(slide_wall_hole_t/2)]){
+                    cylinder(h=slide_wall_hole_t+q,r=slide_wall_hole_dia/2,center=true);
+                }
+            }
+            // hdd mounting-holes
+            for(x=[-(slide_base_w/2-slide_wall_hole_t/2),(slide_base_w/2-slide_wall_hole_t/2)],y=[draw_hole_y1,draw_hole_y2,draw_hole_y3]){
+                translate([x,-draw_hole_y3-draw_hole_dia*2.5+y+draw_hole_y3/2,-slide_base_h/2+slide_wall_z_offset])rotate([0,90,0])cylinder(h=slide_wall_hole_t+q,r=draw_hole_dia/2,center=true);
+            }            
+        }
+    }
+}
+
+module slider_filler(){
+    difference(){
+        cube([filler_w,draw_hole_y3,draw_hole_dia*2],center=true);
+        for(x=[draw_hole_y1,draw_hole_y2,draw_hole_y3]){
+            translate([0,-(draw_hole_y3+draw_hole_dia)/2-7.5+x,0])rotate([0,90,0])#cylinder(h=filler_w+q,r=(draw_hole_dia/2)+0.5,center=true);
+            }
+    }
+}
+
+module slider_top(){
+    translate([0,slide_base_l/2,slide_top_h/2+slide_base_h]){
+        difference(){
+            cube([slide_base_w,slide_base_l,slide_top_h],center=true);
+            translate([0,0,0])cube([slide_base_w-(2*slide_wall_t),slide_base_l+q,slide_base_h+q],center=true);
+            for(x=[-(slide_base_w/2-slide_wall_t/2),(slide_base_w/2-slide_wall_t/2)],y=[-(slide_base_l/2-slide_wall_t/2),(slide_base_l/2-slide_wall_t/2)]){
+                translate([x,y,0]){
+                    translate([0,0,flange_h])cylinder(h=slide_top_h+q,r=slide_wall_hole_dia/2+flange_d,center=true);
+                    cylinder(h=slide_top_h+q,r=slide_wall_hole_dia/2,center=true);
+                }
+            }
+        }
+    }
+}
+
+module clip_small(){
+    translate([(slide_base_w/3+slide_base_w/5)/2,slide_base_l/2-slide_base_l/2.5,slide_bottom_t/2+mt*1.5]){
+        difference(){
+            union(){
+                cube([(slide_base_w/3+slide_base_w/5)/2-slide_base_hole_dia,slide_base_hole_dia*2,mt],center=true);
+                translate([0,0,mt/4])rotate([90,0,0])scale([1.25,1,1])cylinder(h=slide_base_hole_dia*2,r=rod_hole_dia/2,center=true);
+            }
+            for(x=[-(((slide_base_w/3+slide_base_w/5)/2-slide_base_hole_dia)/2-slide_base_hole_dia*0.75),(((slide_base_w/3+slide_base_w/5)/2-slide_base_hole_dia)/2-slide_base_hole_dia*0.75)]){
+                translate([x,0,0])cylinder(h=slide_bottom_t+Q,r=slide_base_hole_dia/2-0.5,center=true);
+            }
+            translate([0,0,-mt/2])rotate([90,0,0])cylinder(h=slide_base_hole_dia*2+q,r=rod_hole_dia/2,center=true);
+        }
+    }
+}
+
+module clip_wide(){
+    translate([0,slide_base_l/2-slide_base_l/2.5,slide_bottom_t/2+mt*1.5]){
+        difference(){
+            union(){
+                hull(){
+                    translate([slide_base_w/5,0,0])cylinder(h=mt,r=slide_base_hole_dia*0.66,center=true);
+                    translate([-slide_base_w/5,0,0])cylinder(h=mt,r=slide_base_hole_dia*0.66,center=true);   
+                }
+            }
+            translate([slide_base_w/5,0,mt/2])cylinder(h=mt*0.75,r=slide_base_hole_dia+q,center=true);
+            translate([-slide_base_w/5,0,mt/2])cylinder(h=mt*0.75,r=slide_base_hole_dia+q,center=true); 
+            for(x=[-(slide_base_w/5),(slide_base_w/5)]){
+                translate([x,0,0])cylinder(h=slide_bottom_t+Q,r=slide_base_hole_dia/2-0.5,center=true);
+            }
+            for(x=[-slide_channel_w/2:1:slide_channel_w/2]){
+            hull(){
+                translate([x,0,-slide_base_hole_dia/2+mt/2-layer*2]){
+                    rotate([90,0,0])cylinder(h=slide_base_hole_dia*0.66*2+q,r=rod_hole_dia/2,center=true);
+                    }
+                }
+            }
+        }
+    }
+}
+
+
+module clip_rear_base(){
+    translate([0,slide_base_l/2-slide_base_l/2.5,slide_bottom_t/2+mt*1.5]){
+        difference(){
+            union(){
+                hull(){
+                    translate([slide_base_w/5,0,mt*0.5])cylinder(h=mt*2,r=slide_base_hole_dia*1.15,center=true);
+                    translate([-slide_base_w/5,0,mt*0.5])cylinder(h=mt*2,r=slide_base_hole_dia*1.15,center=true);   
+                }
+            }
+            translate([slide_base_w/5,0,mt*2])cylinder(h=mt*2,r=slide_base_hole_dia*0.75+q,center=true);
+            translate([-slide_base_w/5,0,mt*2])cylinder(h=mt*2,r=slide_base_hole_dia*0.75+q,center=true); 
+           // translate([slide_base_w/3,0,mt*2])cylinder(h=mt*2,r=slide_base_hole_dia*0.75+q,center=true);
+           // translate([-slide_base_w/3,0,mt*2])cylinder(h=mt*2,r=slide_base_hole_dia*0.75+q,center=true);           
+            for(x=[-(slide_base_w/3),(slide_base_w/3),-(slide_base_w/5),(slide_base_w/5)]){
+                translate([x,0,0])cylinder(h=slide_bottom_t+Q,r=slide_base_hole_dia/2-0.5,center=true);
+            }
+            for(x=[-slide_channel_w/2:1:slide_channel_w/2]){
+            hull(){
+                translate([x,0,-slide_base_hole_dia/2+mt/2-layer*2]){
+                    rotate([90,0,0])cylinder(h=slide_base_hole_dia*2.3+2*q,r=rod_hole_dia/2,center=true);
+                    }
+                }
+            }
+        }
+        translate([0,0,post_h/2+mt*1.5-q]){
+            difference(){
+                cylinder(r=slide_base_hole_dia+q,h=post_h,center=true,$fn=100);
+                cylinder(r=slide_base_hole_dia/2,h=post_h+q,center=true);
+            }            
+        }
+    }    
+}
+
+module linkage(){
+    translate([0,slide_base_l/2-slide_base_l/2.5,slide_bottom_t/2+mt*1.5+post_h/2+mt*1.5]){
+        rotate([0,0,55])difference(){
+            union(){
+                translate([0,-(link1_l/2),0])cube([post_h*2,link1_l,post_h-1],center=true);
+                // set1
+                cylinder(h=post_h-1,r=slide_base_hole_dia+3,center=true);
+                // set2
+                translate([0,-link1_l,0])cylinder(h=post_h-1,r=slide_base_hole_dia+3,center=true);
+            }
+            cylinder(h=post_h-1+q,r=slide_base_hole_dia+0.25,center=true);
+            translate([0,-link1_l,0])cylinder(h=post_h-1+q,r=slide_base_hole_dia+0.25,center=true);
+        }
+        translate([-0.66,-23.5,-post_h-5]){
+            difference(){
+                union(){
+                    cube([link2_l,post_h*2,post_h-1],center=true);
+                    translate([-(link2_l/2),0,0])cylinder(h=post_h-1,r=slide_base_hole_dia+3,center=true);
+                }
+                    translate([-(link2_l/2),0,0])cylinder(h=post_h-1+q,r=slide_base_hole_dia+0.25,center=true);
+            }
+            translate([link2_l/2,0,(post_h)/2]){
+                difference(){
+                    cylinder(r=slide_base_hole_dia+q,h=post_h-1+post_h,center=true,$fn=100);
+                    translate([0,0,post_h/2])cylinder(r=slide_base_hole_dia/2,h=post_h+q,center=true);
+                }
+            } 
+        }
+    }
+    // washer, arbitrary values
+    translate([0,13,33])difference(){
+        cylinder(r=7,h=1.5,center=true,$fn=100);
+        
+        cylinder(r=2,h=1.5+q,center=true,$fn=100);
+    }
+}
+
+module base_end(){
+    difference(){
+        slider_base();
+        translate([0,slide_base_l/2+slide_base_l/7,0])cube([slide_base_w+q,slide_base_l+q,slide_base_h*2+q],center=true);
+    }
+    clip_rear_base();
+    linkage();
+};
+// #####################################
+//drawer_mockup();
+difference(){
+    union(){
+        translate([13,draw_l_front+5.5,0]){
+            slider_base();
+            translate([0,0,0.1])slider_top();
+        }
+    }
+    translate([13,draw_l_front+63,6.5]){
+        disk_mockup();
+        translate([0,0,9])disk_mockup();
+    }
+}
+translate([13,draw_l_front+5.5,5])clip_small();
+translate([13,draw_l_front+5.5,10])clip_wide();
+translate([-(draw_w_inner/2-filler_w/2-slack/2),draw_l_front+draw_l_inner/2-5,slide_wall_z_offset])color("pink")slider_filler();
+
+translate([13,draw_l_front-25.5,0])base_end();
+
+
+
+
+
+
diff --git a/openscad/own/supermicro_sc808t/ssd-diskshelf_slider/iteration4_poc/disk-slider_POC-redesign_full.stl b/openscad/own/supermicro_sc808t/ssd-diskshelf_slider/iteration4_poc/disk-slider_POC-redesign_full.stl
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index 0000000..9bffec0
Binary files /dev/null and b/openscad/own/supermicro_sc808t/ssd-diskshelf_slider/iteration4_poc/disk-slider_POC-redesign_full.stl differ