I am close to finishing up with a 485 total electrolytic/tant recap. Should I replace the power supply/horizontal amp ceramics?

No.

lop pol via Groups.Io wrote:

That was a fast reply and I like the answer. Thank you.

I agree - ceramic caps hardly ever fail, especially in ordinary supply bypassing applications. They can get leaky, though, but that hardly matters for bypassing. I can recall only three ceramic cap electrical failures over the last decade or so. One was a HV type in the cathode supply of a scope, and the others were in PLL circuits, where leakage upset operation - one in a Rb standard, and one in a HP8566B. I have seen a few that were cracked and such, but that's mechanical failure due to external issues.

Ed