Well... I started back doing some work on this 'long term' project today. I'm still looking for something to use as a male 'card edge' adapter so I can mount the MPI unit on top of the case. I'll need two since there will be a shielded cable running from the CoCo3 to the MPI, and one running from the floppy controller to slot 4. Will be asking a few people if doing that way will cause any problems. The cable from the CoCo3 to the MPI will need to be 2-3feet long in order to be able to take the thing apart.
Anyway, I finally got the Model III keyboards 'reset' button wired to the CoCo's. I'm also, thanks to a recent acquisition, planning a little surprise any one who wants to play games or listen to vintage CoCo music... You should be able to tell by the attached pics (sorry, they're from my iPhone), however, they don't tell the whole story.... :)