I just bought the 995TS. The directions are kind of sparse. How tight is the operating handle supposed to be tightened? I tightened it hand tight and it didn't lock back in the notch, so I tightened it some more with the wrench. It locked back for about ten times then I had to tighten it up more. It has worn the paint of the shroud where it rubs. Is that normal? Is it supposed to lock back with an empty mag, no mag? To disengage the hold open, what is the correct procedure? How should one work the operating handle when dry firing?