The entire gun is 1.5" PVC.
The upper portion of the tee is the actual "cloud" part. It is plugged in the rear and bottom outlets. I will use a holesaw to remove the PVC step inside of it so that a pipe can fit all the way through it.
The blowgun/trigger is built into the angled handle and I will a route the hose you see up through the vertical handle so that it still incorporates the effective "air from below the gun" concept.
The cloud will use 30" of 5/16 brakeline for its barrel but has a thread-on cap so I can put on different ones if I want.
Gun alone:
All Parts:






