Pro-tip: Be very careful with how you tighten the screws locking in the clamps. The stress on those clips is very significant and can often be overstressed. My team, 19575 Close Call, had an issue with overstressing the clamp and needed to rerig our entire arm!
This is much better than string. but this too has issues. as the spacing between pulleys is not great and edges are not deep enough, belt slides and border of the belt start wearing out and gets jammed.. may be good for 3-4 games and need to be replaced.. there is better way to do this!!!