Just a FYI/PSA, in 2.1.20 there was an API change, fuel_category now is fuel_categories!
So the mod is unusable with the newest version.
Failed to load mods: Error while loading item prototype "boompuff-spore" (capsule): ItemPrototype::fuel_category was removed. Please use ItemPrototype::fuel_categories.

Yes, been on holiday but trying to get all the mods updated in my small amounts of time between. At least its a trivial change. haha

Damn you work fast! Thanks for your hard work! (love your mod, me like the big booms).