On a similar note, I am also looking into developing a board that converts a lifter into a giant servo. It would just involve fitting the board between the Rx and the lifter ESC and then attaching a potentiometer to the lifting arm or whatever it is you're controlling to provide servo like control. It would also have another potentiometer on the board to allow it to be tuned to the setup being used. Is there anything like this already available? I had a quick look and couldn't see anything..

I'm thinking of designing a few different types of these little boards, which I can then send off on one production print run. Currently got the valve controllers, and the servo adapter... any other suggestions? I've been asked to do a mixer that failsafes correctly before, but I think those are already available...