It does look how I suspected, low on the low end, high on the high end, and the target area isn’t very far off.
Try adjusting the p2.0.13
not only is it an ignore below, but it also shifts the rpm’s, and that might just do it. Otherwise, I don’t have a good solution. Build Botics, Longboards (that’s a separate issue all together), and Carbide Controllers are notorious for this.
You might also want to entertain modbus connection with the db25 connector.