please could you make a 1x1 version? like the Deadlock Stacking machines

Thank you for the suggestion, but I have to admit it sounds a bit impractical as these entities require an item input, and item output and one fluid port.
Maybe by having 2 passthrough fluid ports, kinda like the boilers and heat exchangers, but that sounds like a lot of work for such a seemingly simple request.
Also I am bad at making graphics tbh, so I would need to find some.

there are at least 2 mods providing 1x1 assembler, and also two with an inline storage tank 1x1
so there are some templates available. you just have to put the right parts together. and assmbler pipe pass-through has the code for the connectors
so this is more a puzzle as a development. ;-)

Well yeah it definitely sounds doable, it's just that before I'll be able to allocate enough of my personal time to have a look at this and get some proper result you may have to wait a fair bit ^^'

no hurry, developing should be as much fun as playing, otherwise it would be work

Your suggestion is apparently implemented in someone else's fork of my mod: https://mods.factorio.com/mod/fct-barreling-machine

Thank you. I have created a bottle filler (1x1 chemical plant) in the meantime, but the barreling machine was still missing.