What about cutting floor to drop? Assuming 3/4" subfloor or even at half. Cut that out, sister on new wood to existing joists so that new subfloor is flush with top of joints.
So really long thread but fun if you are into it. As mister Gump said I am not a smart man bit I can sorta follow the red bouncy ball.
What hit me was as Ted and others are calculating all their Einstein type formulas for swapping i/o to ob, he jumped in with moving something a 'wee bit'. A...