Yes, he called me first thing and I have the right springs and followers on the way. I am using MBX mags in a Staccato XL and they can hold 23 rounds. Max amounts are definitely dependent on the firearm itself. I can get 24 in the mags, but it will not load on a closed slide.
Also, the mags need to be loaded multiple times and then left loaded to get that spring “settled”. I went from a max of 22 to 24 this way. My Canik mags went from 18 to 24 after breaking the springs in. The Canik will run 23+ 1. It can load full mags with no issues, unlike the Staccato.
I ordered the Carry Optics set, but they have the X followers and I can use them in my Staccato tubes if I want. I’ll update when they get here!