In a different post, Kevin Hancock cited the older Kremlin spray guns
for having a poor hook for hanging it. The Kremlin gun does have
a rather "open" hook which tends to let the gun fall.
I like to lay the gun on the table when filling the pressure pot.
We simply used a large dowel, large enough that the hook
can't escape it. I took a picture to illustrate it.
While I was at it, I took a close up picture of the Kremlin air cap.
The air cap is the most unusual feature of the gun.
The holes in it are very precision and abundant.
The first close up is of the exterior front.
The second close up is of the interior.
~RichC
Gig Harbor, WA