I love to tinker with 2D starship "tool kits" in Paint.Net. I've gotten pretty good at it too. Most of my parts come from the major parts source for 2D kitbashing, Vance. I've also done a fair amount of "partbashing" using Vance (and others') parts. Plus I've tried my hand at a few basically "ground up" parts of my own, with just detailing from other parts.
Here's a sample to get things going:
Con X4k.png
Posts
Galaxy2285e1.png
Heres another version of Resolute with added detailing
Mk II
Mk II
Mk III
Anyways, here's "Connie's Little Sister"
The doomed SS Valiant mentioned but not seen in "Where No Man Has Gone Before"
UESPA logo by Reverend
and here she is without the "trike" nacelle