Had the same thing happen a few times when using new o-rings. Fixed itself with a few uses.
Though I think it would be pretty nice if this problem (turning the mouthpiece also controls the draw resistance) would be an extra functionality. Stick with me for a sec ...
I think we all use our Revolve in a way where we have our favourite settings dialed in? Airtube-choice (drc or direct), airpaths choice (the 3 modes) and with that also airhole size, overall draw resistance, ti or glass. So when I take a hit, the only thing I actually have to control (if I choose to) during the inhalation, is how much I cover the airhole. In that sense, the Revolve is a 'perfectly set and forget' device.
It could be nice to have the extra functionality of being able to control the overall draw resistance mid-inhalation, simply by using your lips to hold the mouthpiece in place while turning the body with your hand. A third mouthpiece-option:
live draw resistance control. Simply by turning the entire mouthpiece, instead of doing it by turning the tube (pre-hit) with my thumbnail. This way, one could change the ratio between fresh air and vapor during the hit.
The easiest way to accomplish this, I think, would be to use a slightly (a few tenths of a mm?) thicker O ring (than the black one) in the connection between mouthpiece and airtube. And since switching the mouthpiece setting is a 'switching o-rings' type of deal anyways, I totally wouldn't mind having to put on a different one all together. Perhaps a different color to keep them apart from the normal (green and black) ones. Basically, to make the resistance between the mp and airtube bigger than the resistance between the airtube and helix. I think this could be a great addition to the already rich functionality of the revolve, without having to change the device itself. And I also wouldn't mind paying a few extra cents for the addition of a few thicker small o-rings.
(tried to replicate this 'problem' by using a black one between mp and tube, and a green one between tube and spiral), but after a few uses it still all worked normally)
Honestly it's even weirder. I just got an order from Dynavap and I explained to them what the devices were and sent them a link. I don't understand what is so different this time that they are giving me grief
The inconsistency of bureaucracy :'(