Yes, SM mode. The only "workaround" i use is that Subsurface, the software I sue for calculating my dives, shows me both TTS. So I can write down the TTS with bottom gas equivalent. So if it says 70mins TTS on the computer(bottom gas only), I would know this is equivalent to the "correct" TTS with all the gases. Still **** feature. Also a bit disappointed from APEKS that didn't responded. The other strange stuff is that It calculates my gas consumption ONLY on tank1 (both are with Transmiters). I have tried to switch transmitter, still only tank1. So its not the transmitter the issue