I actually use a reamer for scope ring alignment, to me it seems to work a little better, especially it there is more than a very minor alignment problem.

Brian, I don't think you'll have a problem witht he Nikon, I had one on my 475 for a while and it held up fine.

I won't be wronged. I won't be insulted. I won't be laid a-hand on. I don't do these things to other people, and I require the same from them. John Wayne-The Shootist