I like the sound of your first method with the digital display and the rocker switch. That seems like it would be a handy option for on the go adjustments.
I think you are to late I was at a farm show last week and there was a fellow selling what you are talking about inventing looked like it would work he was from Scobey Montana Allan Juel
I agree, great idea. I would prefer the digital readout to. Have you tested this for very longIJ My one question would be if the motor goes bad can you still adjust it the old fashioned wayIJ