[danshaffer]

Hmmmmmm
The intent of the rule seems to be that you can swap out your entire superstructure, as long as both superstructures fit within the rules.

The drivetrain (which in this game could qualify as a scoring robot in and of itself) should parallel: if you build a tank-drive and an ackerman and a swerve, you should be able to swap between the modules provided that they all fit on weight.

so now, what if you took superstructure A and put it on the tank, then decided to switch to superstructure B on the swerve? It's obviously a grey area.