--- /dev/null
+// challenge-bot
+// GNU AGPLv3 (or later at your option)
+// project available at these locations:
+// https://gitorious.org/ozzloy/challenge-bot
+// https://github.com/waynegramlich/challenge-bot
+
+use <wheel.scad>
+
+qr_size = 54;
+qr_height = 2;
+
+wall_width = 3;
+
+wheel_width = 6;
+wheel_radius = sqrt(2 * pow(qr_size / 2, 2)) + wall_width / 2;
+
+motor_shaft_radius = 3.7;
+motor_shaft_flat_width = 4.8;
+
+translate([-30, -0.6, 0]){
+ wheel_black(wheel_radius,
+ wheel_width,
+ motor_shaft_radius,
+ motor_shaft_flat_width,
+ wall_width);}