I had a simalar idea after competition this year after our omni wheels proved flimsy (I still have some parts)
I would really like to see this work, but my team cant afford to try
to drive, I would suspend the track betweeen two chains or belts
It would be much smoother insted of trying to drive a "square wheel"
it would also need support in the middle (difficult with indevidual links)
I would use sliders maybe delrin or something tough (and replaceable)
Hopefully next years game warrants using something like this