Good evening,
I have a small concern.

Since Bitcoin Core stores the pub key unencrypted on the computer, I wonder whether there would be a risk if I connected Specter to the Core.
You could theoretically calculate the Prv key back if you had the pub key.
(I know, very difficult but certainly doable with a quantum computer)

What does it actually look like when you set up a multi-sig wallet at Specter?
Won't the whole thing be more difficult to calculate, or does it make no difference whether single-sig or multi-sig?