At the risk of sounding ignorant, can it be done? How hard would it be for a person that has only a foredom (a good quality moto tool) some files and a vise? I have a bunch of the 32 round magazines and I just got a pistol that came sans any 20s. If you have ever done the conversion please enlighten me with your knowledge. On a side note, none of the IMI/star marked mags. will be used for this.