This is the third version of the dragonfly style drive that we pioneered last off-season with all issues discovered, resolved. Now in traction mode it operates like a eight wheel center drop, and can switch at will into four omni-wheels.
(Below is posted the CAD files and code)
https://drive.google.com/folderview?id=0B-OTy4TNsrC3dlJVOGFCTXJKb2M&usp=sharing