Fishbertus

@OP I would suggest putting the surface attach point right at the middle, on the inside, so that when you have 2x symmetry on and surface attach it (to a part of the right size) it will seem to be attached all around but it will really only be attached to one point per side. Although, for stability sake, if you think your PC will be good enough maybe make the circle in 4 or even 8 pieces.

I hope this doesn't count as a necro, it is on the top page. Anyways, on to my post: I don't know much about texturing 3D models (yet) but I do absolutely love that engine, it's beautiful as it is never mind with an awesome texture on it. I do believe I might be able to help you, depending on what and where Nutt007 is doing. I already have an idea in my head of what I would do the texture like, let me see if I can show you.

Armchair Rocket Scientist has a good point. Also, I love the idea of a big RCS thruster. *uses it on every ship ever forever*

This seems really useful! Although I think you should only double up the tanks, like 2 Jumbo 64s and 2 200xs, because anything more is really bad for heating. Also some 2x and 4x Oscar Bs would be useful, and also segments of those rectangular wings, like 2 or 4 in a row, because really, who only uses one?

This looks awesome, if it can be made as a standalone mod (without Kethane etc...) I would definitely use it once released.