Rotational Moulder/Castor

This is a smallish Rotational Moulder/Castor I've developed. As part of Design and Technology my students learn how to draw and develop their own designs. This project has given me the opportunity to open their minds to the possibilities of 3D printing as well as giving me a good platform to teach other plastic manufacturing techniques.

I haven't had an opportunity to cast anything yet. But it does work well. I've attached counter weights to allow it to rotate smoothly.

Hardware Shopping List

BOLTS
M3x18 x7
M4x20 x1
M4x50 x1
M4x65 x1
M6x35 x1
M6x50 x1
M6x155 x1 (threaded rod)

NUTS
M3 half hex x 7
M4 Lock x6
M6 Hex x4
M6 Lock x2
Bearings
ID-4/OD13 x7 (ebay)
ID-6/OD15 x4 (ebay)

ALUMINUM EXTRUSION
12x12x1.4 U channel
-4@230mm (mitered corners)
-4@280mm (mitered corners)
19.05x19.05x1.2 RHS
-4@100mm
-2@200mm
-1@300mm
-1@25mm

MISC
62x Smallest sheet metal screws i could find
RC Bevel Gears (ebay)
12V DC Reversible Gearhead Motors - 36RPM (Jaycar)