I want a Franken-pad!!!!
I see no reason that I wouldn't be able to put a 2nd gen wifi logic board and a 3rd gen battery into a 1st gen unit and get the best combination of battery, power consumption and performance.
I could buy a 1st gen unit, sell the battery and board, use my 2nd gen and sell the screen, battery and case, and buy a replacement 3rd gen battery from ifixit as soon as they stock it.
Thoughts? Conflicts? Likelihood of success (I give myself 5/10 tech skills, 10/10 tenacity, and 10/10 obsession with details and planning... A- in physics 2, for what little THAT was worth, ha!)?