Sorry, I didn't mean two hours specifically, but I think everyone has a different "flow" state. I actually split my day into 3 3.5 hour blocks with breaks in between. I think I might have ADD or something, but if I sit in one place for 4 hours i usually lose my mind, which is probably why I've never had a real job.

Anyway, I figured there is a good ramp up. The first frame is hard to build because you don't have all the nice toys, but each frame gets a little easier to make because you put more into equipment.