Kipper2k had made Vampire adapter boards for the CDTV. Hopefully someone will produce them in the future.
. What adapter board? V500 fits in CDTV CPU socket. But it must be put a little bit higher with precission adapters.
I don't know if anyone has a custom Kickstart to use the optical drive.
This is the real problem, I have 2.3 bootrom and it does not work in CDTV mode.