fix 3d design raspberry stands

cad/case2.scad

@@ -9,7 +9,7 @@ height=58.0;
 hdmi_y_space = 33.0;
 pi_z = 40;
 
-$fn=50;
+$fn=250;
 
 module base(x, y, z, thick, bottom_thick) {
     translate([corner,corner,-bottom_thick])
@@ -40,18 +40,18 @@ module base(x, y, z, thick, bottom_thick) {
 module holes(r, h, w,w2) {
     holes_x=58.0;
     holes_y=23.0;
-    translate([0,0,0]) {cylinder(r=r,h=h); translate([-w2/2,0,h/2]) cube([w2,r*2,h],center=true);}
+    translate([0,0,0]) {cylinder(r=r,h=h); translate([-w2/2,0,h/2-2]) cube([w2,r*2,h-4],center=true);}
-    translate([holes_x,0,0]) {cylinder(r=r,h=h); translate([w/2,0,h/2]) cube([w,r*2,h],center=true);}
+    translate([holes_x,0,0]) {cylinder(r=r,h=h); translate([w/2,0,h/2-2]) cube([w,r*2,h-4],center=true);}
-    translate([0,holes_y,0]) {cylinder(r=r,h=h); translate([-w2/2,0,h/2]) cube([w2,r*2,h],center=true);}
+    translate([0,holes_y,0]) {cylinder(r=r,h=h); translate([-w2/2,0,h/2-2]) cube([w2,r*2,h-4],center=true);}
-    translate([holes_x,holes_y,0]) {cylinder(r=r,h=h); translate([w/2,0,h/2]) cube([w,r*2,h],center=true);}
+    translate([holes_x,holes_y,0]) {cylinder(r=r,h=h); translate([w/2,0,h/2-2]) cube([w,r*2,h-4],center=true);}
 }
 
 difference() {
     union() {
         translate([-4-3.5-5,-hdmi_y_space,0]) base(width, length, height, wall, wall);
         difference() {
-            holes(3.5, pi_z, 20,13);
+            holes(3.5, pi_z+4, 20,13);
-            translate([0,0,pi_z-16]) holes(2.0/2+0.2, pi_z, 0,0);
+            translate([0,0,pi_z+4-16]) holes(2.0/2+0.2, pi_z, 0,0);
         }
         translate([58-(41.4-3.5),-28,pi_z+1.8]) rotate([90,0,0]) { // usb
             cylinder(r=6.0/2+tolerance,h=6);