Moved polysink test to avoid clash in the big picture.

Fixed rounding error in hangin_hole assert.

tests/screws.scad

@@ -25,16 +25,16 @@ module polysink_stl() {
     n = len(cs_screws);
     size = [n * 20, 20, 10];
     difference() {
-        translate([-size.x / n / 2, $preview ? 0 : -size.y / 2, -size.z])
+        translate([-size.x / n / 2, $preview ? 0 : -size.y / 2])
             cube($preview ? [size.x, size.y / 2, size.z] : size);
 
         for(i = [0 : n - 1])
             let(s = cs_screws[i])
                 translate([i * 20, 0]) {
-                    screw_polysink(s, 2 * size.z + 1);
+                    translate_z(size.z)
+                        screw_polysink(s, 2 * size.z + 1);
 
-                    translate_z(-size.z)
-                        screw_polysink(s, 2 * size.z + 1, alt = true);
+                    screw_polysink(s, 2 * size.z + 1, alt = true);
                 }
     }
 }
@@ -52,7 +52,7 @@ module screws() {
                     screw(screw, length);
             }
         }
-        translate([80, 140])
+        translate([80, 20])
             polysink_stl();
 }
 

utils/hanging_hole.scad

@@ -35,7 +35,7 @@ module hanging_hole(z, ir, h = 100, h2 = 100) { //! Hole radius ```ir``` hanging
                         poly_cylinder(r - eps, h - layer_height);
             }
     }
-    assert(z % layer_height == 0, str(z));
+    assert(z - layer_height * floor(z / layer_height) < eps, str(z));
     infill_angle = z % (2 * layer_height) ? -45 : 45;
     below = min(z + eps, h2);
     big = 1000;