Good thread. All my bows are single cam so i dont worry about cam sync, just timing for me. I did come across a really good dvd set called "The Self-Reliant Bowhunter" by Michael Braden. I havent had a chance to watch it yet but it was highly recommended by folks on AT. $30 bucks from Lancasters. It supposed to have very detailed video instruction on bow setup and tuning. Good luck with your setup, its addicting.
I always wax the ends of my loops. It will really cinch them down tight. Doesn't take a lot either. If u really cinch the knots down tight It can separate the servings. I don't worry about it a whole lot. I just get it tight enough so it move on the string. I tend to tie mine tighter than a lot I work on. Mine won't move.