chain inside box tube is a pain in the @$$ to work with. unless you have access holes that i'm not seeing, its going to be really hard to get chain on the sprockets.
i was not really impressed with the versa wheels. in my experience they wear down really fast. my team ran them for about an hour of practice driving and 10 matches before they pretty much balded.
picture (i understand that other teams have not had the same issues with the versa wheels wearing down that fast)