Very nice! But pricey! all it needs is a Kadet kit.
I?ve found a SP01 9mm barrel that fit my 40 SW slide and frame nicely (not all do). 40?s and 357 sig will feed fine from the 9mm magazines, just with less capacity. And when using full power 9mm, even the factory 40sw springs work reliably.
The czc barrels look nice! I?d bet moving between them would hold up even better than what I?ve got.
I have wondered about the wearing in, but after only a couple thousand rounds, have seen no sign of additional wear. I think if starting with barrels that fit nicely, there should be no problem.
I have one of the small pelican cases with the 75B, 40 slide, Kadet slide, 22, 9mm, and 40 barrel. Makes it nice to essentially have the one gun but be able to shoot the ammo I want/need to.