Nice, thanks for the info!
Yes, I did notice that you can let air out quickly just by pulling the valve body against the spring. I think I did about the same with the retaining nuts on my valves, tightened them all the way then backed off a tiny bit (don't remember how much).
It would be cool if the valves had exact markings showing which orientation inflated which chamber, but it's in the user manual if I remember right.
We've been loving our boat, out on the river with the family 2 or 3 days per week all summer long. Here's a snapshot from a couple nights ago...