I like this idea. Granted I play with NEX and Industry Evolution (is that it's name?), with the later allowing for Salvage Yard as an industry (harvesting debris fields and derelicts for Metal and Ship Hulls). In addition, you can grant the colonies there autonomy and just get a small tax each month from them. But I digress.
I guess if you have Heavy Industries doing Ship Hulls, Heavy Weapons and Supplies, being able to then upgrade it to:
- Orbital Works (Ship Hulls)
- Munitions Plant (Heavy Weapons)
- Space Chandlery (Supplies)
Even in vanilla, I found myself having 60+ Gamma Cores, and several other cores to which I probably had 20 Corrupt Nanoforges and several pristine ones sitting in storage. To this, you'll find more or less all the blueprints as well.
As such, I would even go so far as to say the tier you have puts a cap on the size of ship you are able to build.
Maybe a Scrap Yard or Heavy industry can give you some clunky Frigates or Destroyers (Lore: The Valkyrie can land on planets).
Want those Cruisers and Capital ships, build them in orbit at your Orbital Works.
Want some juicy high-tech ships? Build a Technologistry and make some AI-cores available.
No, just Midline floats your EVA-suit, okay then skip the AI-cores, but at least have a nanoforge of some sort attached to it.
So what if you have to specialize an entire planet to making the ships you want. Having low-tech d-mod loaded ones are the way this sector is supposed to travel. Would be nice if one could press a particularly offensive d-mod and be asked if repairing it is desired. But again, I digress.