A Color Computer and attached Multi-Pak Interface can be a precarious combination. There is nothing latching the two together so one wrong bump can cause the two to separate. This has a high possibility of frying the CoCo or the Multi-Pak Interface. During the CoCo's run in the 80s, there were many advertisements selling a "locking" plate for your computer combination. I just finished up a base plate for my CoCo 3 (26-3334) & MPI (26-3124). The CNC router I have access to has a knife tool used for cutting paper. So first I cut out a paper sample to check fit. Then I cut a second, and then a third. Finally happy, I routed out a base plate from ¼ inch plywood. The CoCo stands 0.28" high so I am hoping I have enough air flow under the case. In case I don't I've designed a second template with cut-outs under the vents. Here are PDFs of the files so people can see what they look like. And here is a link to the CAD files. For material as thick as ¼ inch I really do suggest the "vented" template. The wood base plate I cut works with all of the CoCo 2s and 3s I have. I'm considering drawing some other combinations:
CoCo 1 with Original MPI (done, added 10/23/2014)
CoCo 1 with New MPI (done, added 10/25/2014)
CoCo 2/3 with Original MPI
Let me know. If the response is high enough I'll do it. I won't be offering routing services.
