If you're this far involved in a floor pan replacement, consider exchanging the RH and LH pieces you bought for a full floor pan. The half panel I bought to cut patches from was thin and of the wrong shapes. Fortunately, I didn't need large parts from those repair panels. I read the full panel is supposed to be more accurate and thicker. It seems like you're not saving much cost or much labor when you're replacing both halves by themselves.

Is your car supported solid, true and level for this repair? The floor keeps the car square and you don't want things shifting around once you're into this surgery.