I hope that is a good way to approximate its sound?

The Moth 2A3 was quite beautiful sounding, yes.

Most of the old Moths however aren't as sonnically capable as the newer Eddie Current stuff to my understanding. They just look and are built much better.

I was originally going to have Craig upgrade the Moth 2A3 so that it was the best of both worlds: his more recent ideas with the better Moth parts. That would have been something: on or above the level of the Balancing Act. But Craig has his hands full enough with his [Eddie] current stuff, so sadly this was not to be.

do Moth 2A3s also work with 45 tubes?

Well, the moth does have a certain warmth and smoothness that the current lineup just doesn't have. It never strays into stridency.  When people talked about the ZD being a smooth ride in a luxury car that doesn't necessarily let you feel all the bumps in the road, I felt that was pretty apt.  Not going to be as piercingly detailed as a 445 or mkiv, but not everyone is looking for that.

The ZDSE is still my favorite Eddie Current amp (Nautilus excluded). Wish I could get it with something like the original Moth Xana casework, even though I think the ZDSE has its own industrial beauty.

That has got to be THE most beautiful manual ever.