[fargus111111111]

The opperating surface is also something to consider. The typical carpet in frc applications does compress some but not much and produces a lot of resistance if all 6 wheels touch. Due to these factors some extra clearence is not bad. Someting smoother and harder like the reoglith floor from 2009 does not compress and produces much less resistace and so a much lower clearence can be used. I assume you are using all traction wheels but putting omnis on at least one end eliminates the need for a drop at all.