Looking in GC2Types, it seems all the jewelry addons for customizing your ship are in this file. This seems like it would hinder modders because any new pieces of jewelry won't be available without updating the mod. Some mods that use thier own ship models and jewelry may not want other jewelry used, however mods that use the default ships may want to let the player use whatever jewelry is available to them normally.
Can the jewelry structures be put into a seperate xml to facilitate the needs of modders?