Will the provari holster hold a provari with the extension cap and a 3 mL liquinator?
I've designed the ProVari holster so that either cap should fit well since the two cap options only changes the relative position of the button by half an inch.
To use a tank with any of my flip-top holsters I need to adapt the pattern a bit. There are so many tank styles now that I can't keep track of them all, so it's best if you let me know the height of the one you plan to use (not counting connectors and such - I just need to know how much overall length it adds to the height of the mod). For an open-top holster, no adjustments are needed for a tank.
Also, if your tank is significantly larger in diameter than the mod you are using it on, and you want a flip-top holster, that can pose problems depending on exactly how much of a difference there is.