The battle between belt and chain drive. Haha
Just take care of your converted chain to belt drive guys, if your using laces or any sort of thick fabric, if the tension on the pedal is tight it could somehow become loosen. And then you have to replace it.
I watched my friend used a thick fabric, don't now where it came from, and he used it for a power glide ic, after two months it stretched.
So he decided to use fan belts. Haha, but I think its better though.