[Poita (Peter)]

I received the Meade 10" SCT, but it didn't come with a visual back.
I went to put my celestron visual back on it (from my old C8) but it doesn't fit.
The diameter of the threaded hole in the rear cell of the Meade is about 3.25"/82mm instead of the 2" one on the celestron.

What do I need to buy to be able to use my 1.25" eyepieces?

Is it a 3.25" to 2"SCT adaptor, or is it just a 'large' visual back, or is there a diagonal that comes with that thread?

I've spoken to Andrews and they were unable to help, Bintel tried to help also but the part they recommended doesn't seem right when I look at it.

I'm obviously asking them for the wrong thing, so if anyone can point me to what I need I would be most appreciative! I feel like such a doofus.

Thanks,
-Peter