I just went on a short shallow dive in my pool, my first dive with the D420 was not awe inspiring to say the least, I found the lever was very high which seemed to need more poppet spring pressure to stop freeflow. I adjusted it and sent it to James79 so he could fashion and adjusted for it and I got it back just in time for the lockdown. I had wondered if it would perform better in the water than it seems to dry, as rsingler suggested it should, I was skeptical but willing to give it another shot, except for the not being able to thing. Today I wanted to make some underway adjustments to my pool sweep and decided to test the 420 and my new dry gloves so let me say, the gloves were great and the D420 had me shifting toward being a believer.