Hello Bruce,
Sorry, I have a Hammerhead, can I still play with you?
I fly the unit mostly manual and when there is task loading or when I feel lazy, I switch to the high set point. Even for ascent.
The solenoid fires at a low rate and with the HUDs, I control every time my PpO2. From time to time I compare the displays, all say the same value, incredible!
When in manual mode, the HH is mostly set to OC mode, the parachute opens at 0,19. That is for shallow dives (40m). Deeper, I will set it to a low set point (0,5).
I haven't had any issue with the controller yet (battery, solenoid stuck opened), I cross my fingers.
The hybrid system is very very pleasant to dive.