I have a question for the Trimix Circular Divers: do you dive exclusively with Trimix Diluent, or do you use air as a diluent for dives up to 30m? From the filling logistics, it is easiest for me to fill only Trimix, no matter if I dive flat or deep. The costs for a 3l trimix filling are negligible, as well as the additional deco time due to the helium content. Or are there situations where Air Diluent makes more sense? For example, because you only need one bailout stage with Nitrox 32 instead of two, as is the norm with Normoxic Trimix dives (Bailout 18/45 and Nitrox 50)?