I have a 1978 model Back (mens model) size 6' that I'm looking to trade or sell. It's in very nice cosmetic shape but the mechanical parts need some work. Sometimes it gets twisted slightly and mobility is suddenly decreased. I'm not quite sure what it'll take to fix it, but I'm currently looking at a new carbon fiber Back, so I need to get rid of this one pretty quick. $100 or trade for something interesting. Thanks for looking!