You can modify the base plates, with a Dremel. I'm glad, however, that I'm not faced with this aggravating issue. My only .45 on the CZ model, at the moment, is a Witness Sport Long Slide, and it is fine, as is. (I've got a couple of CZ-97B mags that I use with it, and they are identical to the EAA factory mags, and both types are made by Mec-Gar.)