Remember of course that one of the *really* annoying things about CP/M is that basically every manufacturer used their own proprietary disk format (IE, different sector sizes, directory formats, etc) so even if you have a working CP/M machine of brand X there's a good chance it won't read disks for brand Y without a translator program. I assume you have a working Kaypro "two", is it the original "II" or the later "2"? I think (but am not sure) that the latter won't boot disks for the former, and possibly vice-versa, but should be readable in the second drive. (And of course a Kaypro CP/M disk won't boot on a TRS-80 Model III or 4; the III actually won't run CP/M at all without a hardware modification, it's TRS-DOS only, and the 4 needs a version of CP/M tailored to it.)