Compression: There is a balance between the amount of compression the ring is seeing as it passes by a pulley versus the amount of compression it sees as it is in the middle of the belt. The amount of normal force, and thus the amount of friction, that the belt can exert on the ring greatly decreases in the middle of the belt. The extrusion side of the C-Channel could be used to have infinite adjustability on the mechanism to find the distance that has the perfect amount of compression. Once this is determined, the hole pattern of the c channel can be used to fix everything in place