I got my century arms WASR-10 back in October. I ordred a bunch of Tapco polymer mags. Tried inserting one and it simply wouldn't fit. Century Arms aparently did at bad job of opening it up. I had to sand down the magazine lips to get it in. Now I would like to fix the mag well by bringing it up to the correct dimensions. My delema is are the Tapco mags to big or my mag well to small. Does anyone have the proper dimensions for an WASR mag well?