I have several 10 round magazines for the Beretta 84 BB. The magazine body is the same as the 13 round mags as is the spring and the follower. (identical) The magazine is limited by dimples pressed in from both sides that stop the follower. Is there any drawback to me getting in there with a file and filing off the dimples? It would leave to 1/8" square holes in the mag, but I don't think, that if I get it good and clean, on the inside, it will be a problem. The process would remove the bluing and invite rust, but I am rust's worst enemy. Any thoughts? anyone else done it?