Be warned -- the Kadet Kit may NOT work with your pre-B. The hammer of some pre-Bs are much wider than later model pre-B guns, and with the B series. (The pre-B hammer simply won't fit in the notch at the back of the slide -- and it can't hit the firing pin.) I've had several pre-Bs, and my Kadet Kit didn't work on any of them. Some of the last pre-Bs, which look like B, would probably work.
The Kadet Kit SHOULD work fine on your other CZs, however. And they can be marvelously accurate. If they go on the frame, they'll work. And fitting isn't as critical as some might think: once installed on the frame, the barrel, the upper unit (which looks like a slide, but isn't) and the sights are one single unit; as long as you use the sights, the units tend to hit where aimed. Only a small "slide" assembly moves, and it doesn't have to realign consistently.)
You need at least one Smith and Wesson J or K frame snubbie, or Colt Detective Special.
Oh ya.. and a P-O8 Luger, or Walther P-38, or PPK, or Colt 1911.
Ya gotta have at least one old militaria handgun of some sort.
There have been several great suggestions, thank you!
What do you guys think of the TT-33 Tokarev in 7.62x25, or how about the Ruger SP-101?
I found the other day and put on layaway a S&W 686 CS-1 with a 3" inch barrel, but I'm not really sure that I want to get it. No box or paperwork though and the grips weren't the original Pachmayr round butts. But doesn't appears to have a lot rounds through it though...