While trying to install my new rear disc brake system today I got a dose of 50 year old truck problems. The carrier bolt pin was sheared allowing the center pin to rotate and gall. I still haven't gotten the pin out but it's pretty clear I need a new carrier and gears. Are Yukon posi units good quality? I see some for sale on ebay for much less than jegs or summit. I'm thinking they're knock offs or stolen. Which posi carriers did you go with and why?