Hi Chris,
Your Motor is asking for 28A at 15.95V.
So you should set your max. to 29-30A.
I need to have a look at the current limiter results when I'm back home since my tablet will not open the file (for whatever reason).
Maybe you should start with a calibration current of 15A. You can try to increase it (if needed).
Boom diameter = Armdurchmessser = 18mm
Might be a little less; needs to be verified when the U8 is running properly.
this is a big prop --> you may need to increase start voltage and advance to make it start smoothly.
Joerg