[sdcantrell56]

Yeah I must agree I have never actually witnessed a robot I was involved with breaking chain. It can definitely happen but for the most part as long as it is tensioned and aligned there's just not enough force to break the actual chain.

I'm currently working on a new version that is 6wd with a plywood frame and the center wheel is directly driven by the transmission shaft. Hopefully I'lll have it up within a week or so.