Why is the kitbot chassis bowing in horribly

[Max Lobovsky]

This sounds minor compared to everyone elses problems, but when bolted together in one of the suggested configurations, two rails were noticeabley not parallel (measured at ~.5" over the entire length). I did not assemble it, but I heard that the people doing it had significant trouble getting the last pieces bolted in because of the bowing.

[Jeff K.]

Ya, something like that happened to ours. We built a prototype and whenever we ran it, besides it making the noise, we also found loose nuts and bolts, and so we tightened everything and then afterwards, the noise stopped. The top panel on the gearboxes might be warped because of the way you mounted it onto the two gearboxes. Probably just tightening everything might fix it.