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Gary:
I think the only solution is to buy Ron a set of curb feelers (those metal things that you mount to the side of your car for parallel parking). Fasten them each hip and he won't have to watch his turns, he'll be able to listen to them. That frees up his eyes for rule number 1 (or is it 3), yielding to slower skiers (that would be you) on the slopes down the hill from him.
Jim -