My takeaways from this experience...
Oddly enough, I didn't realize that the side clip batteries weren't a friction hold... at least mine weren't. The negative through hole piece was at least an eighth of an inch long and it curved back. I had to rock it out with the iron on it.
I forgot that all lead free solder looks like cold solder joints, so the job took 8 times as long. I'm never using that garbage for high risk stuff again.
The bit-district jig helped, but wasn't as secure as I had hoped. Putting the battery back in from the bottom was the hardest part.
The only other thing I would like to share, if you are doing this in the cab... even if the lady at the hardware store gives you funny looks, a set of knee pads are worth every penny.
Power cycled the cab after a 5 minute rest, it is still alive and kicking. I brought the cart in from the garage to trim the leads and put it back in the original case and of course it started pouring rain. I guess this means I need to bring the thing in so I can start restoring it. next step will a good cleaning, and some new controls.
Sounds like the rain has slowed, so back out to put things away so I can put the car back in.
*nope* rain still going, I couldn't hear it because it was blowing sideways.