On the 52, as long as you don't dry fire it then you should be good on the firing pin. Of course, it wouldn't hurt to have one stashed away somewhere either. Harrington Products sell both the pins and rollers, if you haven't already found them there.
You can dry fire a CZ 52 with snap caps. Finding them in the first place was a trick, but that was before Google. You may not have much trouble finding some now.
Scott
