My Nikko Mk1 has developed a small problem. I was setting a mates rifle up with the Nikko mounted and after a few minutes of adjusting the mag ring it came loose and would not mag up or down. I then noticed that the small screw on the mag ring was loose, I tightened it up and all was OK.........for a few minutes, then it happened again. The small screw is only threaded near the head, the rest of it is just tapered and smooth and smaller in diameter. I can see where it locates after sliding the mag ring off, but when I try to put it back in it won't hold, and the mag ring is very stiff. I may have to send it to John Lee to have a look at it. So has anyone got details for him, or any of the MFTA Lads who go to NEFTA Winter leagues could do me a big favour and give it to him. Thanks for any help resolving this. Neil.