Heya there, thanks for your great mods, I use them a lot, and I appreciate your effort.
May I suggest that you set the recipes for the incinerator, e-incinerator, and the gas vent to unlock with technologies just like the flare stack itself. I suggest that the gas vent can be unlocked along with the flare stack in oil processing, and the incinerators may be unlocked along with the steel and electric furnace in materials processing technologies.