Scoped my RC couple years back, don' t have to have it rebuilt, yet at least, and both of my shoulders have been thrown out of socket/dislocated enough to the point that I have severely winged scapulas and am able to pull my shoulders out of socket with minimal effort (<--they said this was probably the reason I didn' t completely destroy it upon my last tear), I used to do it as a party trick in fact, just sit in a chair, grab the seat and lean back, my shoulder drops an inch and a half, then I elevate it past level with my shoulder, and it falls back in....and I don' t have any problems with recoil. If you' re wondering why my shoulders are so rough, it was a combination of breaking horses, riding bulls, playing football, and wrestling, maybe I' m tougher than most, but I wouldn' t care to think so, read my above post and you can see the ' punishment' my shoulders take on a daily basis just due to recoil, and like I said, it' s never been a problem. My shoulders are the least of my problems though, and I take glucosamine and chondrotin, along side all of my other vitamins/minerals/protiens and I work all of my injuries like I' m supposed to, do all of the stretching and what not that the PT had me doing, my last MRI' s showed I had considerable scar tissue in my shoulders (now my knees are another story), but less in fact than I should, and very little arthritis, which should have been prominant by now, maybe this stuff would help you guys?