This is kind of like the blind leading the blind here....

You are making the assumption that loss of lbm is the same rate as the loss of fat. I doubt that it is, but haven't found anything to go on one way or the other. I think that's one of the outstanding questions that has to be answered.

I don't have a clue what size I'll be when I've finally "arrived." When I look at my sisters, I would doubt that I'd ever get below a 12 or 14. None of us have ever been that small. Maybe shoe size is a good indicator. I wear a size 10.