Well, I saw this on a CZ forum and had to try it. As you know the compact uses a 14 round mag which gives you a total of 15 capacity. I went ahead and bought a couple of Mecgar 16 round magazines, a couple of SP01 baseplates from CZ Custom and voila! My compact is now 16+1. The SP01 baseplate covers the gap and only adds exactly a half an inch to the bottom of the grip. I'm not sure it was worth all that for two more rounds but I needed a couple of extra mags anyway. I had a good time fighting with the springs and baseplates and now that I have checked it out, it made me happy. Now it is even mo' coola.