Uberman and Variation

[Ryles]

I've been looking into starting a uberman/everyman sleep schedule because it might help in college and starting now gives me just at a month to adjust. However, every schedule I set up ends up having Monday knocking it off (in uberman and everyman 3hr core one of the 20 minute intervals literally starts at the same time as a class starts, 1.5hr core it just won't work). Does anyone know if it's alright to have one day a week where you start a 20min interval about 40 minutes ahead of time, or which schedules allow for this variation best? Especially after only a month. And if anyone has advice on other schedules- that'd be fine, too. These are just the only ones I've seen. Edit- I'm 17 right now, will be 18 in November. I don't know, I'm not a doctor or anything, but it doesn't seem like I'll be experiencing any giant changes leading to the day I turn 18 when something switches or whatever. What are the dangers of doing it under 18, if there are any? I've only seen vague ones.