Recalibrate Wake Plate Gauge

Does anyone know how to recalibrate the wake plate gauge?

I have a 2007 Supra Launch 20 SSV with the medallion gauges. I had an issue with the Bennett actuators (long story) which I since have resolved, but in the process, the calibration of the wake plate gauge got slightly off (by about 10%). The issue is not the actuator itself, because the actuator with the position feedback was essentially untouched (no new parts except for o-rings). It actually got off calibration during the troubleshooting process before I even pulled and opened it.

I contacted Bennett, in which they suggested to take it in to the dealer. I also did some searching online that said basically the same thing. I’d rather not get charged $100 for a dealer to hit a reset button. Does anyone know how to do this?

Many thanks,
Rob