[mrnoble]

We used our 6" Mecanum drive base over the bump last night and this morning. No issues with scraping, but if you go with Mecanum plan on not going over the bump without issue unless you don't have an approach angle greater than about 10 degrees. Once one of the wheels lifts off, it will have difficulty moving at all.

We are also experimenting with WCD, 4" 8 wheels. Unless the belly pan height is increased, I guarantee trouble with high centering.

Not saying that either of these options aren't viable. It shouldn't be too much of an issue to build to meet the constraints, and drivers just need to practice.