This mod changes the science packs of Vulcanus, Fulgora and Aquilo by making them more challenging to transport between planets, just like Gleba's agricultural science pack.
Tweaks
Mod category: Tweaks
Small changes concerning balance, gameplay, or graphics.
Vulcanus (Metallurgic) science pack size is 20, and inserters fill the rockets with 20 stacks = 400 science packs. Rocket capacity is 600 packs. Rockets never dispatch because they are not full, but there is no space to fill them any more.
Thank you for pointing that oversight out, it should be kinda fixed now. I just increased the default stack size of the Vulcanus science packs to 30, And it should be possible to mess with the mod settings to lower the rocket cargo capacity to 400 to have the stack size back to 20 for a slightly harder experience.