Switch the ADV for something else, the original has 2 settings, leaky and impossible to breath from. I hated diving my pathfinder until i tried out my friends CL with a apkes reg for adv. It solved 90% of my buoyancy issues.
I felt like Tom Cloony batman until I switched to silicone loop hoses, it actually made looking left and right possible.
The original HUD is hard to see in sunny conditions, nerd was to distracting for me but my friend had a custom HUD with brighter lights and it made it actually useful.
Function properly in all conditions.
Sorry, I had to.