"While off the trigger, the DPV's handle rotated to the 6 oclock position. Did not really like this, since this does drag on the sand, when you're close to the bottom. Need to figure a method of preventing this. I would like for the handle to sit at the 3 o'clock position, when it comes to a stop. Would greatly appreciate any help in adjusting the DPV so that it behave sin that manner. That was my only quirk."
That's the only thing I wanted to change on my Genesis 2.1. So here's what I did. You can use it as a starting point for your own. After I finished my scooter is neutrally buoyant and it is perfectly trim with the handle upright. when I let go to do something (with the trigger locked and speed off) the DPV stays exactly in position. No rolling, no nose sinking, no tail sinking, handle upright.
This is in fresh water with no weights inside. I added .7# on the bottom near the back of barrel just in front of the separation joint. That made the handle not roll. Then on top I made a buoy of 1-1/2" sch 40 PVC pipe with 2 caps. The distance (after trying 5 different lengths) between the caps after gluing was 3-3/4". I placed that just behind my front mounted Sea Rover Deck compass. The PVC can be slide up or back to get the trim exact, or if you want the handle to rotate to the 3:00 position, then just move the weight and the PVC to get that orientation when you let go of the DPV. My Genesis 2.1 is now perfect for me!
Picture below.