Hello I have a Collins R-391 that i got 7 years ago by trading a non working air compresser for it! Its serial #29 and had the ifs alingned.. Dont see why Collins go for such high prices , i like the sound of my SP-600 and tuning over the collins..Plus so much lighter too. Gee maybe by the time i go to sell the Collins it be worth its wieght in gold ! Anybody seen a NC-400 for sale at a good price? Great site enjoy it a ton ..See you later thanks Angelo
