Success!!! Salvage work complete. Minor tuning should fix the overshoot and I’m off to the races. Thanks for everyone’s input on what to try with this. It was a weird one and it won’t win a beauty contest, but it works.
May I present the 1.11 Franken9201 shield. It has a z axis that runs with a project kit LM298 board (red) soldered to connections on the channel 2 instead of the chip in the MP2 location that had to be removed. I had to cut some traces and solder the ID pins and make a custom 51.30 firmware version… but it works!
The Z axis overshoots, but moves very quickly and corrects to its desired location.
(note that the solder mess in the lower left had to be moved one pin up to identify as 11 instead of 1 FYI:the bigger the blob, the better the job)