Just some notes:
I think the VVPV looks best with the drip shield since it matches the thickness of the adapter tip, and the extra thickness it gives the atomizer stem more of a balanced look. Most pics and vid's seem to have a drip shield too.
I don't like drip shield unless the atty is airy and seems most 901's are airy so that's a win. I use a stealth adapter to keep the height minimal.
Some are using a drip shield on a 510 too.
One youtube vid reviewer pointed out that the VVPV is a mod to keep for a long time because all the parts are replaceable... anything goes out, you can order a part for it.
It's amazing how fast it recharges. I ran mine down tonight, and got if charged in an hour or less.
My favorite atty is the 901 hh357 but other than that, I like an i06 (with Wharf's SS sleeve), and I'm digging a "better life" LR 901 from Valuevapor.
I'm still getting leaking at the plunge rim where the it slides down on each press, but i put a folded piece of paper towel to asorb the very slow leak. I reconfigured the tubing to minimize kinks too. That's my only problem. I have an extra bottle setup but heck it's working great as is for now. I also put an o-ring under the bottle to get the button to stick up a little higher.
I still like the LR hh357's just because I hate changing things that work great for me...don't want to jinx it. i ordered a 2.0, and a few more 1.5's. I suppose the LR's eat up the batt charge faster, but this APV's voltage can go pretty low too anyway.