"So... one of the problems I had was getting the boat to the surfaced waterline. The bladder was constrained by the upper hull, so I couldn't inflate it fully without bowing it.
Drastic surgery was needed."
Next time you or anyone else has that problem you might want to go up to the next larger size bladder. That will give you the same amount of air in the bladder with less height, and could solve your problem without major surgery. Sometimes you can get better scale waterline by just placing the bladder horizontally over the WTC, instead of vertically, using the overhang like saddle tanks.
I like any ideas that save work.
RCABS- It's easy to control your own bladder!