Jake,
I had a QPD on my 07 America and broke the belt at the BA Ralley that year. I had been in touch with Bob and he sent me a new belt while in Dahlonega that year. I ran the belt the rest of the time, until one day driving off the base in P-cola when the primary started ratcheting?! Anyway, ended up being the primary was dragging on the case. speaking with Bob again he recommended a .050 spacer to try and move the sprocket out far enough to stop dragging. To date I have the chain on since then, just never got around to working with the sprocket. I intend to re-install the belt when I get back to the states.
My 2 cents
Trumpy
