I've heard similar things before, especially regarding 'set points' and it makes total sense to me. I think this is a GREAT plan. It's nice because it also allows yourself to go into maintenance mode - which can be a very scary adjustment! It should be easier to switch into maintenance mode if you lose weight in chunks rather than all at once where it could potentially be easy to go up those last few pounds. Then once your body is super comfortable at 128 it should be easy to lose, and less frightening to maintain. Excellent goal, lady :)