Ditto on the aftermarket firing pin and never trusting the decocker. I tested my CZ's decocker at the range, out of curiosity. Though I was entirely ready for it, it still sent a rush of adrenaline through me as that decocker fired a round downrange.
Though I know I'll catch a lot of flak, I recommend that you not use corrosive ammo in your CZ-52. It's not just a matter of pulling out the barrel and pouring hot water through it. The primer evil spreads throughout the entire frame, and the CZ-52 is a pain to fully disassemble. After seeing what happened after just a few hundred rounds, I would feel guilty firing corrosive ammo and not taking the whole thing down by all its parts. Everything gets rusty.
No matter how inexpensive they (and the corrosive ammo) are, they're a classic design and piece of history that we should respect.
If you want inexpensive, go Kel-Tec.
-Sans Authoritas