I worked for Bill Surh in '71 and if I remember correctly he fitted the Ryan with an anti-spin chute for a while. I think it had an external cable down the side of the fuselage. Bill was quite a character and loved the odd-ball aeroplanes, RC-3 Seabee, DO-27, and the cargo version of the Fletcher the FU-24A. I flew the Seabee and the Fletcher for him, interesting days. The Fletcher was a single seater and I just got in it and flew away. Later we learnt we needed a letter in writing from Freddie Fox to do that, I received my appproval after flying it for a month! Fred found out and gave me a right bollocking over the phone and said, "he would be watching me". As a very young bloke at the time I was scared stiff of him. Now it just makes me laugh.