Those are outstanding!
I like .006" or .008" wire for things like this too. What you said about the #80 bit is true.
I just count on the epoxy that I put in the hole to fill it so you don't see a "swimming" big hole around
the hoses where they go into the body.
Do you do something else? Are you using #82 or #85 bits?
I prefer 0.006" dia. brass wire. It's easy to form and flatten the ends. While more work than etched parts, you can get quite close to scale size and also avoid the "flat" look:
One trick for wire is to use a small enough drill bit for the pilot holes, since scale-sized wire will swim in the hole from a #80 bit.
Ed