That's quite a collection of cameras and lenses.
I used Yashicas when I was on the journalism staff at high school. If I understand you correctly, you're still using some lenses from your SLRs on DLSRs by mounting an adapter on your DSLR. Typically, this means no autofocus and totally manual operation. With this setup, does your in-camera light meter work or do you have to use a separate meter?