Ever thought of making an Official Discord for Galacticraft?
Most of Minecraft mods now have Discord servers for easier dev and user communication so why not have one for Galacticraft?
Idea is that you could make your own rocket models using Armourer's Workshop model creator.
Different tiers would mean different sizes and special blocks for thrusters and anything else you need for an actual rocket.
Also custom Launchpads for the rocket sizes.
Other idea was custom glass...