Supporting all of my stupid Mustangs is killing me and I'm getting cheap in my old age. I want to put a locker in the car that I've been racing- a spool won't work because it does see a little street time. Instead of having to spend about $600 on a detroit locker and another $175 having it installed, I was thinking of installing a Powertrax Lock Right. Supposedly you can install them yourself without removing the ring gear(and pinion) because they fit into the stock carrier. They go for $270 on ebay. That's quite a savings. Anybody ever use one or have any experience????