Caster ball wheel re-design

The newest ball caster wheel

I have yet again re-designed the ball caster wheel, this time I incorporated bumps into the design in an attempt to reduce the surface area in contact with the ping-pong ball and therefore aiming to make the ball run more smoothly. You might also notice that this design has two bolt connections, this is to help reduce movement of the acrylic parts. I have also made another small edit in the design, this is to make it slightly stronger so that it wont snap as easily, however, it was slightly stronger, but it was still not strong enough and broke fairly quickly.

A side-on view of the caster, you can see the bumps quite clearly

The design files for this ball caster wheel (v0.3 - v0.1 and v0.2 are implemented in the chassis designs) can be downloaded from Dropbox.