Have both a cv64 and retina z3. Never had issues in my 3k's with either (both buster 11).
Had also heard cv weren't 100% z3 compatible...
Prefer the z3, if you can find one you won't be disappointed.
Good luck!
p.s. I would almost sell you my Z3 for what I paid for it ($750.00 USD in 90's!).
