I got my 10-20 awhile back and also at the same time I bought some Jet belts for it. I do plan on buying rolls in the future but I still have all of the belts I bought that I want to use. I am going to make a hardboard template for the angel of the flap and the length and I want to get things right before I do.
It is like they are about 1 inch to long, I have a lot of problem getting them on and when I do get them on they want of lap over each other. I have the flap in as far as it will go into the clip on each end of the drum and the spring in the clip pulls on the belt like it should.
I have taken an inch off the belts and they go in much easier and do not lap over each other, I get the left side square with the end of the drum but it still wants to overlap itself at some point.
The question what am I doing wrong, I push the flap in as far as it will go in the spring clip on each end.