His dudeness: My boss had to add autofeather to more than a few new aircraft, the salesmen would order the aircraft without a/f and the buyer would want it. His best recollection was that it cost $30,000 USD to add it...in 1978
Thanks. The episode I talked about was 1993ish...and in Germany, prices usually are higher here by 20-30%. I´m sure it was a pretty penny...