the specialities of your mod( forced usage/storage of all oil products ) , i love them, it's just that sulfur is a by product of oil consumtion when making plastic or consuming oil products to make fuels for power.
no real way to synthetize sulfur, and the tech to get sulfur from space with space age is locked behind gleba ( that tech enable someone to separate carbon asteroid fragments into carbon and sulfur ) then someone could simply build a space ship travelling with the only purpose of collecting sulfur and dropping it where it is needed
in your mod, we can consume sulfur to make more plastic with less oils stuffs so we don't have an excess of sulfur stockpiling forever
but as we need sulfur to make lube, and lube is needed to make foundry on vulcanus, and on vulcanus we only have coal tungstene calcite and sulfuric acid geothermal vents
maybe enabeling a way to make sulfuric acid anywhere with some kind of organic compound, and then enabeling us to extract sulfur from sulfuric acid ?
that way, wherever we are, if we need a really big amounts of sulfur fast, to make lot's of laser turrets and accumulators for exemple
we could make it from plastics, in let's say an extremely polluting process, that way we could sink plastic excess prod into sulfur
but that's too OP
maybe having another recipe in one of the cracker to crack coal into carbon and sulfur ??? or a recipe where there is more prod of hydrogen sulfide at a serious detrimental cost of other oils products so that it would be a bad idea to just do that process and use as much sulfur as possible to consumme less oils products to make plastic ?
anywhay, i love your mod, thanks you again ^^