From what I hear, having a tempo change next to rests can mess with syncing. This can be fixed with replacing rests next to tempos with v0 notes. So other than that, I want to ask about the guitar tracks (not the guitarbass though). They like, have way too many notes dude. Even when optimized all three tracks contain roughly 3.5k characters, surpassing rank 1 composing's 2.5k limit. You're gonna have to do some major editing to fit all that in, especially since two of those guitar tracks are missing a tempo change at 13 and change at measures 33 and 53 for some reason. It looks like a seven man jam right? You should make it an eight man jam to fit another guitarist in.