I'm working on a KT ordance 80 reciever and I think I took too much out of the mag well. I filed the righ side raised grooves flat and when I insert an empty mag there is a bit of play. How much play is too much? I haven't got my lower parts yet and I'm hopeing that the mag retainer will some how take up some of that play. Second question: can some one be kind enough to post a pic of the bottom of the mag well so I can get an idea of how much to champher(sp?) the opening.

Go to www.ray-vin.com/frtech.htm then click on the page12.pdf .
Hope that helps

I would rather have loose mags than tight mags.  Some looseness in the magwell is a good thing.  As long as it feeds well and the mag dosn't fall out when it's not supposed to, it should be good to go.