just a thought is it possible to make them 1 item and support both inline and 4-way. so kind of like how pipe work, we dont have to craft all the intersections.
edit: ah stupid me so it will become just 4-way lol. actually, is it possible to have an option to only have 1 tank at a time, either inline or 4-way.
Making an option for enabling just one or both of the variants shouldn't be too hard! I can take a look at it in the near future. (Changed title to reflect new request.)