Update:
Just wanted to revive this thread and once again ask if anyone has had direct experience with adapting a 30ish Ericson to use an oar sculling system, or any other boat for that matter. I'm wondering what type of measurements would have to be made and at what angle (using the top of the stern where the oarlock is mounted as a perpendicular plane) the optimal amount of forward force would be derived? If I can estimate the angle, then I can take the measurements myself to see if the wheel will be a barrier for a sculling oar.
Thanks for all the help and wonderful advice,
I'm getting CLOSER!
Cave Dog