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diff --git a/openscad/own/shelf-mounting/STL/shelf-mounting.stl b/openscad/own/shelf-mounting/STL/shelf-mounting.stl
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diff --git a/openscad/own/shelf-mounting/shelf-mounting.scad b/openscad/own/shelf-mounting/shelf-mounting.scad
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+// shelf-mounting
+// 2022-07-28 by zeus - zeus86@github.com - cc-by-sa-nc 4.0
+// #############################
+// vars:
+mnt_w=25;
+mnt_d=mnt_w;
+mnt_h=mnt_w;
+mnt_hole_dia=5;
+countersunk=1;
+mt=5;
+plate_offset=5; //offset from center for the plate-facing screw
+wall_offset=2.5; //offset from center for the wall-facing screw
+$fn=100;
+// #############################
+// model:
+
+module mountblock(){
+    difference(){
+        cube([mnt_w,mnt_d,mnt_h],center=true); //base-cube
+        translate([0,-mt/2,-mt/2])cube([mnt_w-2*mt+0.1,mnt_d-mt+0.1,mnt_h-mt+0.1],center=true); //cutout cube
+        rotate([90,0,0])translate([0,0,-mnt_d/2+mt/2])translate([0,-wall_offset,0]){
+            cylinder(r=mnt_hole_dia/2,h=mt+0.1,center=true);  //screwhole, wall-facing
+            if (countersunk == 1){
+                translate([0,0,mt/4])cylinder(r1=mnt_hole_dia/2,r2=mnt_hole_dia,h=mt/2+0.1,center=true); //countersunk if applicable
+            }
+        }
+        rotate([90,0,0]){translate([0,0,plate_offset])
+            rotate([90,0,0])translate([0,0,-mnt_d/2+mt/2]){
+                cylinder(r=mnt_hole_dia/2,h=mt+0.1,center=true);  //screwhole, wall-facing
+                if (countersunk == 1){
+                    translate([0,0,mt/4])cylinder(r1=mnt_hole_dia/2,r2=mnt_hole_dia,h=mt/2+0.1,center=true); //countersunk if applicable
+                }
+            }
+        }
+    }
+}
+
+
+// #############################
+// draw models:
+mountblock();
\ No newline at end of file