Oh! I had meant the 2 screw holes on the bottom for attaching the base to a surface (3 if you count the hole that contains a M3 nut too). Thanks for clarifying!
I finished the code for PI loop tuning. It compiles and should work without much fuss. Now I need to include the test for finding the ideal rotor time constant. We're on a roll, so I'll modify the AC controller code again, and add a serial command for this too. I never thought it would be practical all in one hex file, but it's proving to be a lot easier than I thought it would be.
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