I have a 1972 Arrow II with a Century II autopilot. It has the original AI which, I believe, would make it an Edo-Aire (due to the autopilot). I have some former fighter pilots and a former crop duster living in my neighborhood and a few of them have told me they would take me up and show me how to roll my airplane. One of them brought up a good point though - the AI crashing and becoming a $400.00 roll due to the cost of an AI rebuild. I asked one of the A&Ps in the neighborhood and he said that it might have stops to keep it from crashing and that I shouldn't be too worried. Then I read an article about a banner towing operation that quit fixing their AIs because it got to be a pricey operation - and that was just from steep banks (or was it pitching up after grabbing the banner...). So... should my AI be OK? Should I be worried? Should I just do another roll in the other direction - just for safety, of course?