Engineering? Atmos? Engines? You name it, this is the place for all that spaghetti piping and how to avoid a Chernobyl 2.0 from happening in the first place.
(I could not find any better image so here is a picture of the engineer from TF2).
https://atmosia.org/
Suppose I’ll also dump this here, guide on:
-Device ordering (make lots of trit)
-RCCT (make even more trit)
-And recipes for atmos bombs 
Not a place I recommend new atmos techs start, but might be useful if you have even a little experience with atmos.
There i actually an entire forum section dedicated to engineering! Should post stuff there!
Oh whoops, is there a way I can delete this tho