umm..I do all the time. Also, if you do two 70-80 minutes a day and start time is 0830...why are you getting done so late? I could do this and be done and at the bar by 1400these are 70-80 minutes dives not 45 minutes, start 8:30 finish 4:30 no one can do that, used bionic wet suit heater system, one of a kind made the task easy and more fun. I gave the pasalubongs to girls lol