Add IItemstack compatibly regarding CraftTweaker I.E, add a combustion recipe that wants more than one of the same item like 5 saplings. This can be done with.onlyStack(5).transformConsume(5) or something close to that.

Ok I'll try that

Does <minecraft:sapling> * 5 not work?

Hmmm, Jared didn't suggest that

I did this mods.skyresources.combustion.addRecipe(<skyresources:drycactus>,[<minecraft:bone_block>, <ceramics:unfired_clay:4> * 8 ,<minecraft:leaves:*> * 8], 500); And my worlds don't seems to load correctly but they did with out the * 8

try <minecraft:leaves:*> without the * so <minecraft:leaves> or <minecraft:leaves:2> or something like that.

i have a feeling it's because my recipes don't like ingredients that accept multiple things (like ore dict or wildcard metadata)

Works thanks!