I'm working through a request to get my 5Dim Category mod to sort the icons from your suite of mods and I noticed the 5Dim Core mod generated barrel items for Natural Gas and Formaldehyde. However 5Dim didn't make the corresponding Fill/Empty recipes. Probably not a big deal as most don't barrel liquids anymore but it popped out as "missing".

(My mod doesn't do anything but redo subgroups and ordering to keep things exclusively in the 5Dim style major groups.)

Looks like this happens across the suite with fluids by the way. :)