I've built a four-wheel drive push bot, and for some reason it handles like a shopping trolley that can't decide whether to veer left or right. Every time I start moving I just have to guess and hope.
Just tested it now. It doesn't veer as much but it is still a thing, I'm starting to suspect the hinged wedge on the front might be the culprit.
p.s. Yes, a hinge on a 06August bot. I used a beetleweight motor with a small wheel attached, gonna swap that for an actual hinge and see if the veering persists.