I'm not 100% sure why Tracy had 7am as the optimal wu hun. Maybe that just fits in with the average family life. Tbh I drove myself nuts trying to be on 7-7 routine when DD was young, turns out she was more of a 6am wu girl than a 7am never mind what I did. They just have their own natural biorhythm. So yes, you can totally move things up an hour, not a problem at all, just remember these bubbas may have an idea of their own what they would like their average wu to be, you just have to go with the flow really xx