Well, he seems to think he's going to run it from the B&G system that he's got so it begs the question of what's going to happen when his B&G is trying to send a modulated signal to the Chinesium SSR's. I have no idea how the output from the B&G is modulated (PWM? anyone?) but obviously it isn't on/off. PWM straight into a 7hp inductive load could be fun.So he's home brewing all the controls for an autopilot?
Very early autopilots were of the on/off type. Didn't take long before people figured out it is pretty easy to speed control a DC motor.