I think fixing your current male will only be detrimental to his health especially as he ages. IMO, there also is a moral issue if you are doing it only so you might have fewer problems bringing in a younger male. If you are having your doubts now as to your capabilities, or your willingness to sacrifice as would be necessary if you have to crate and rotate, then maybe you should wait until your older male passes.
I have a some Czech yearlings here I imported. I am curious as to what kennel and pedigrees that has you so piqued. Could you PM them to me?
All czech preferably but a mix w Czech and ddr would be ok as well if it meant the dog was domestic.Are you looking for all Czech, or a mix with some Czech and some DDR, or some Czech and some WGWL?