[Lil' Lavery]

Warning about using the torsion springs from the large CIMs as tensioners. 116 had an iteration of our drive last year that used them, and apparently they are not as strong as we would initially believe. As the robot drove at high speeds, the spring would loosen, essentially to the point where they weren't even tensioning the chain at all. Once or twice our chain even popped off. Thus why the final iteration didn't use them.
Your mileage may vary.