My 92 glide has 56K on it, and I intend to keep the bike forever. I’m going to put a new disk on because the rear disk has peaks and valleys worn in it that look like the Rocky Mountains. When putting the belt back on, should it be put into the exact same grove on the rear sprocket as before? When I have the rear tire off I'm thinking about replacing the belt. What is the most difficult thing when doing it? Any other bits of helpful information I should know about when doing this job???