After some PB Blaster on the rust I was able to get the blade off the mower, and then the blade holder off the blade. New blades got delivered, was sharp but not sharp enough, and naturally I couldnt find my grind stone for the drill, so that'll get handled tomorrow. The old blade is imbalanced and I'm just going to chuck it.
Last is wiring the jump/charge port, and I discovered my Weller iron is broken, because of course it is. Weller turned to crap as a brand lately. Need to find a better replacement (260W+)