I learned about the advantages of having a 22 conversion Kit with the Colt 1911 .45acp and Colt ACE .22lr. Shooting the same frame creates that muscle and mental training to make better shots instinctively. Same trigger feel, same operation and functions.
I'm still looking for a SIG P220 45/22 american conversion, if anyone can help.
I have mounted Kadet kits on 2 different guns. Both operate great and are fairly accurate. I like them and use them to gain more experience with the CZ. I believe it helps with real life defensive shooting.
I won't tell you not to buy a Ruger MKII. They are better for target imo. If your interests are purely target, try one. The downside to the MKII is cleaning and disassembly. Maybe I should say re-assembly. It will make a guy cry. I found and installed a simple device (replaces vertical pin) that makes takedown and assembly easier for cleaning, but it was a bit pricey.
I would suggest instead of the Ruger for target, look for an old High Standard. They can be found for less than the Ruger and are superior in quality, value and ease of cleaning.
I have several 22's. I couldn't part with any of them. I like my Kadet and shoot it often.
Trig
