We've used the Kit chassis every year except for this year and Lunacy. With Lunacy, we really don't have an excuse, other than wanting to do our own drive train. This year, we had opted out ahead of time, spent the fall exploring some other drive trains, and were very thankful for our decision and our custom chassis
We have modified the kit chassis before. In 2014 we switched the gearboxes out for toughbox nanos and ran mecanum drive. Other years, we've cut the front and built a super structure to hold it together in order to allow ball intake. But that's really it.
For our custom chassis this year, we did direct drive from toughbox nano's, and welded the nano's to the bottom of the chassis. It was amazingly effective, and set the chassis up high enough that getting stuck was never really going to be an issue. The whole design came out on kickoff day, prior to that we had expected to go with the nano tubes to form the basis of our design.