Those washers are important if it was Harvey's vario- they are like his trademark :>) I tried 2 different notched pulleys I had done with mediocre results. Ended up with windowing a 3rd vario- I like it better on both the stocker and the kitted bike. Lots of precise dremel work. But it limits the weight travel and eliminates sticking, binding, and torn up weight caps. I run a stock belt in there and you saw how well it worked on my yellow hobbit.