ok so i have all access and i was letting my girlfriend test it out on her nexus 7. so i set up my account on her nexus, and i made sure i unchecked all the sync buttons under account besides the play music one. but it still went ahead and synced my contacts, google hangouts, and most other stuff, is there a better way to do that or is that pretty much the only way? i was able to sign out of hangouts for her and fix her contacts display, but still wish i could just sign into music.