Hi, I use the VS880 like-you, i haven't had any sync problems in the *final result-however you might notice that when sending midi clock to Logic with VS as master Logics tempo display jumps around slightly -but in the end everything seems to sync.Also watch out when changing Digital i/o on either LA or VS as the clocks get confused.Anyway if you have any really specific questions I'm sure i can help. JFF -