Rob,
I rarely even come close to my time estimate. A couple of times I’ve surprised myself and actually finished something more quickly than I had thought, but that is extremely rare. I make most of my plans in SketchUp now and that helps me not to forget joints and processes that I’ve thought through numerous times. Before SketchUp, I would often forget the little details and end up remaking parts. Even though I spend an inordinate amount of time designing in SketchUp, I think it has saved time and I know it has saved materials and aggravation.
L/W
“Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety.” Benjamin Franklin