@ Phantom
The perfect solution for you would be to get the Phase 5 scandoubler that fits together with the CV64/3D. Unfortunately they are as rare as rocking horse poo :-( I've just hit the same problem yours as I don't have another Phase 5 scandoubler to go with the CV64/3D in this A4000.

As you can see, I've fitted an internal Scan Magic which has given me two 15 pin outs. Looking at AmigaKit's website, I'm wondering if
THIScould be a possible the answer to our problem?