I think I'd like to minimize the effect on the shed, so I'll go in 15 min. increments.
So, I now do 9am and 9pm. I want to go to 8am and 8pm, so:
Tonight (Sun.), I'll shoot at 8:45pm
Tomorrow morning (Mon.), I'll shoot at 8:30am;
Tomorrow night (Mon.), shoot at 8:15pm;
Tuesday morning, shoot at 8:00am;
Tuesday night, shoot at 8:00pm...and I'm there, is that right?