[asid61]

Wouldn't this be like an actuatable slide drive due to the center wheel? I thought butterfly didn't implement that.
50lbs is a lot for a drivebase. Do you really need those upper supports? It also looks like you're running a 7-cim drivetrain right now, which I'm not sure you need.
I like the design of the modules. I think they're missing a few spacers on the screws though.
That cylinder setup is not the most efficient because of the sharp angle it pushes the module down at. Is it possible to use a shorter cylinder that's more above the module so that it points almost downwards?