v0.4: remove fabric space from spike, no need for it.

skirt.scad

@@ -101,14 +101,6 @@ module spike(size, f_d, f_sx, f_sy, step)
                         cylinder(h = step, r1 = f_d[i], r2 = f_d[i+1]);
                 }
             }
-            // cavaty for fabric
-            translate([0, 0, -0.01]) // remove z bending
-            difference() {
-                scale(size)
-                    cylinder(h = 0.1, r = .85);
-                cylinder(h = 0.5*size[2], r1 = 7, r2 = 7+0.4*size[2]);
-            }
-
             // screw hole
             translate([0, 0, -0.01]) { // remove z bending
                 // heatSetInsert_hole_M3x5_7();