Barrel casting form for Projunk's Mecanum Wheel 82 mm

THIS IS WORK IN PROGRESS, I HAVE NOT CASTED ANY BARRELS YET.
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I have tried [projunk's parametric mecanum wheels](https://www.thingiverse.com/thing:641377), it is great part for a robot. We have printed its barrels using FlexFill and it worked well on the carpet, but we had some issues using it on the smooth surface.

Now I've tried to cast the barrels from very soft polyurethane (Shore A20) using this mold. I think it will ma