diff --git a/openscad/own/kitt-matrix/src/kitt-matrix.scad b/openscad/own/kitt-matrix/src/kitt-matrix.scad
index eea936e..66900fb 100644
--- a/openscad/own/kitt-matrix/src/kitt-matrix.scad
+++ b/openscad/own/kitt-matrix/src/kitt-matrix.scad
@@ -33,6 +33,7 @@ conhole_taper_h=2;    // is this needed?
 conhole_i_d=2.75;   // should fit M3
 conhole_offset=3.5; //offset from outer perimeter
 cutout_w=10;
+mnthole_d=5;
 //echo("offset left is ",offset_left);
 //echo("offset top is ",offset_top);
 
@@ -74,8 +75,8 @@ module panelholder(){
         //translate([0,0,-panel_t_led*3])cube([panel_w,panel_h,(panel_t+(panel_t_led*3))],center=true);
         // screwholes for M3
         for (
-            pos_x=[-(panel_w+mt)/2+conhole_offset,
-                    (panel_w+mt)/2-conhole_offset],
+            pos_x=[-(panel_w+mt)/2+conhole_offset+mt/2,
+                    (panel_w+mt)/2-conhole_offset-mt/2],
             pos_y=[-(panel_h+mt)/2+conhole_offset,
                     (panel_h+mt)/2-conhole_offset]
         )
@@ -87,20 +88,46 @@ module panelholder(){
 module panelframe(){
     translate([0,0,panel_t_pcb])difference(){
         cube([panel_w+mt,panel_h+mt,(panel_t+(panel_t_led*8))],center=true);
-        translate([cutout_w/2,0,pt])cube([panel_w-(offset_left*2)+cutout_w,panel_h-(offset_top*2),(panel_t+(panel_t_led*8))+q],center=true);
+        translate([0,0,pt])cube([panel_w-(offset_left*2)-q,panel_h-(offset_top*2)-q,(panel_t+(panel_t_led*8))+q],center=true);
+        // mounting-holes for sandwich-ing
         for (
-            pos_x=[-(panel_w+mt)/2+conhole_offset,
-                    (panel_w+mt)/2-conhole_offset],
+            pos_x=[-(panel_w+mt)/2+conhole_offset+mt/2,
+                    (panel_w+mt)/2-conhole_offset-mt/2],
             pos_y=[-(panel_h+mt)/2+conhole_offset,
                     (panel_h+mt)/2-conhole_offset])
             {
-            translate([pos_x,pos_y,0])cylinder(d=conhole_d,h=(panel_t+(panel_t_led*8))+q,center=true);
-            translate([pos_x,pos_y,-(panel_t+(panel_t_led*8))/2+conhole_taper_h/2])cylinder(d2=conhole_d,d1=conhole_d*1.5,h=conhole_taper_h+q,center=true);
+                translate([pos_x,pos_y,0])cylinder(d=conhole_d,h=(panel_t+(panel_t_led*8))+q,center=true);
+                translate([pos_x,pos_y,-(panel_t+(panel_t_led*8))/2+conhole_taper_h/2])cylinder(d2=conhole_d,d1=conhole_d*1.5,h=conhole_taper_h+q,center=true);
             }
+        // keyholes for mounting-screws.
+        // mirror([90,0,0])
+        for (
+            pos_x= [-(panel_h/2-mnthole_d*2)],
+            pos_x2=[-(panel_h/2-mnthole_d*5)],
+            pos_y= [-(panel_h/2-mnthole_d*2),0,(panel_h/2-mnthole_d*2)]) 
+            {
+                hull(){
+                    translate([pos_x,pos_y,-mt/2])cylinder(d=mnthole_d,h=mt+q,center=true);
+                    translate([pos_x2,pos_y,-mt/2])cylinder(d=mnthole_d,h=mt+q,center=true);
+                }
+                translate([pos_x2,pos_y,-mt/2])cylinder(d=mnthole_d*2,h=mt+q,center=true);
+            }
+            
     }
 }
 // ##########################################
 
 // DRAW MODEL:
-panelholder();
-translate([0,0,-(panel_t+(panel_t_led*3))-50])panelframe();
\ No newline at end of file
+difference(){
+    union(){
+        panelholder();
+        translate([0,0,-(panel_t+(panel_t_led*3))-5])panelframe();
+        translate([panel_h+mt*2,0,0]){
+            panelholder();
+            translate([0,0,-(panel_t+(panel_t_led*3))-5])panelframe();
+        }
+    }
+    for (x=[-10:1:10])
+    translate([panel_h,x,-12.5])rotate([0,90,0])rotate([0,0,90])cylinder(h=(2.5*panel_h),d=6,center=true,$fn=6);
+    translate([panel_h/2+mt,0,-5])cube([mt*1.75,100,30],center=true);
+}
\ No newline at end of file
diff --git a/openscad/own/kitt-matrix/stl/kitt-matrix_draft1.stl b/openscad/own/kitt-matrix/stl/kitt-matrix_draft1.stl
index 8e606fe..4b012d6 100644
Binary files a/openscad/own/kitt-matrix/stl/kitt-matrix_draft1.stl and b/openscad/own/kitt-matrix/stl/kitt-matrix_draft1.stl differ