[Zeke]

Well, another advantage to pulling the old subfloor is to more easily repair the joists. However, subfloors run under walls so you would be breaking any shear that continuous subflooring provides being compress between the walls and the joists.

You need Jeff to come up there and spend a day. It would be worth 2wice the price of a plane ticket, lunch and dinner plus a decent consultation fee.

I mean it. I'd go but I can't leave. Jeff is more current anyway. Of all the nail benders here, Jeff and I seem to have done more old rat infested, squirrel nested, termite digested old work than most of the others.