Thanks for the input, I understand the mechanics completely now, and I did not take much off, maybe .050, or 1/32 I used some tape to delineate a "fault line" if you will to stop at...
I did stop at a local shop "CZ Custom" (Ghost Products) , that looked over the mags, checked them in the USPSA gauge, and found them out of spec,.. they are all shooters and loaders and very experienced with STI, they set me up with 4mm Grams Base pads, none of them fit proper on the base lips, so they tuned one to accept the Gram, it loaded right up with 20 rounds (eta "19") and locked in finally like it is supposed too, those guys were great...they said I could or should send them out to GE for tuning, he said once you get them back they "will be right",...I am going to trim up the rest of the lips on the bases and run them to the range tomorrow before our Thursday night IPSC match to make sure they feed ok first, they said the followers and springs should be changed out...so I guess those will have to be ordered from somewhere,....any likes on the followers / springs (sources) you guys have had success with?
Appreciate the help....O1