As ya'll know, my Pdox had a stripped hole in the rail. I'm pretty sure the seller was unaware of that, and I think I figured out how it happened. This xbow has had several stocks on it. The screw that was in stripped hole had LOTS of dried up Loc-Tite on it. I'm of the opinion that old, dried up Loc-Tite is the villan here. So, if any of ya'll have to take apart stuff you've used Loc-Tite on, and you're dealing w/ threaded aluminum, I'd take a steel nut the appropriate size and use it to "chase" the threads. When that stuff dries, it's harder than Chinese arithmatic.