Robo3D R1 Bed Belt Tensioner

Robo3D R1 bed belt tensioners fail all the time. I modified the design to improve strength, but now that you have a file for it, just print a couple extra. The band should be kept at the same spot or just a couple notches tighter because this new piece is a bit longer than the original injected piece. As for infill, the more the better, but MTS testing suggests a 60% infill will perform nearly as well as 100%. My first round is actually 20% and working fine. Not sure about relaxation modulus of