Sorry if this isn't really the right place for this, but I find myself curious. Is it possible to configure the speed at which materials melt in the smeltery, and/or what things you can melt? I checked the config folders and in the .jar itself and didn't see anything.

I'm using TConstruct with Extreme Reactors and I can't melt Yellorite Ore, which I would love to be able to do. And as for the former question I mostly just want to make Redstone melt faster lol

Use CraftTweaker and ModTweaker if you want to configure recipes, there are way too many for us to make them all config based in 1.12.