Quick drawing of the screw penetrating the joint & pipe to keep it from swiveling:
For masks, you could simply hang them on the posts that cradle the guns. Guess i'll look into other options. I also should take pics of full gun setups propped on the stand, not entirely sure they'll fit but can't really see why not.
Yeah make sure if can fit even the most obnoxiously large markers lol. Tank and all. And yeah agreed for the mask thing. Already thought of that but might as well branch out.