Consultation: Shipyard bonuses for Gallia and Rheinland

[Karst]

Interesting. Let's look at these in detail.

Interiors, with Copper-Diamonds, have a route of viability between those two sources. If you gain a unit of distance from either, you lose one to the other, so their viability along the route is flexible and determined by the availability of the other two ingredients.
The route between Omega-11 and Coronado goes through Bretonia though, not Rheinland. While building in, say, Hamburg will save you a little bit in cost on the Xenos, that won't be worth the increased distance from both Copper and Diamonds compared to a Bretonia location.
In practice, the ideal spot would be somewhere that has Xenos available, lies on the Copper-Diamond route, and has cheap indies....or in other words, Omega-3.

Sigh.
Edit again: To be clear, Omega-3 is probably the best location but not by a huge margin. Coronado, New London, and Stuttgart are all perfectly adequate. Cortez, Manchester, Cambridge, and Omega-7 are on the route but suboptimal since they lack indies and/or Xenos.
If you want to disadvantage O-3 a bit you could remove Xenos from Freeport 1.

Propulsions are problematic since they use one ingredient twice (Hull Panels take two cargo but the recipe still needs 100). This highly restricts manufacturing locations, since for every unit of distance you gain from a shipyard, you need to lose distance to two of the other ingredients.
This one is really tricky to calculate. Previously, the ideal location was Yokohama shipyard, being the base price source of three of the five ingredients and on the midpoint between the two others. Yokohama is still probably the cheapest location, but the fastest would now be Briancon in Languedoc, which sells every ingredient within at most one jump if you don't mind very expensive Engine Components.

Supers: These are really straightforward. Any location between Freiburg Station and the Cambridge jump gate in New London is basically equally viable, with each unit of distance gained from Gold and Super Alloy losing distance to Ablas and Molybdenum. Seems sensible enough.

Edit: It's worth noting that these changes will skyrocket the prices of Interiors, and further increase the already very expensive Supers. I don't think that's necessarily a bad thing, but yeah. It's a thing.

---