I bought a lightly used STI and it had the exact same wear showing on the frame and slide as the one in this Master Gunworks video. Actually, it was a little bit worse. I was quite surprised to see this obvious lack of proper fitting, on a $2,000 (Cdn) 1911, from a relatively "premium" gun maker. I cleaned it up myself and it's now fine, but I wasn't impressed that it left their factory this way. I took a couple of photos of it, before I corrected it and sent them an e-mail with the photos att'd. Never heard anything back from them. Probably a lesson in here somewhere, but I'm unsure what that might be. Regards - Doug