Hello! I've been doing some testing for a PR for the mod Barrel Stages (https://github.com/Tooster-modding/Factorio-barrel-stages/pull/3) to support modded fluids and work nicely with this mod. I think it works pretty well, so fingers crossed it gets merged.

It works great, but since I did a bunch of testing with this mod I noticed that there are actually some fluids that are not showing up with barrel-equivalents - for example, I can't find the barrel recipe for this fluid from Corrundum (https://mods.factorio.com/mod/corrundum?from=search):

• Recipe: Controlled Petroleum Gas Combustion
• Recipe Name: controlled-petrol-combustion
• Fluid Name: carbon-dioxide

I'm not entirely sure if this is a problem with this mod, or this is a problem with how Corrundum is naming that fluid or something. At first I thought maybe it was something that I was doing, but then I disabled all of my mods except this one, loaded up the game, researched all tech, and can confirm that there is no barrel for that fluid.

Any ideas what might be going on there?

Wait, I'm silly. I think this just means that the mod doesn't have a barreling recipe for that fluid for whatever reason. Is that correct?

You are correct! In Corundum, Carbon Dioxide has a property disabled which would otherwise make the game generate a standard barreling recipe for the fluid.

Good writeup and kudos for the thorough testing :)