I didn't get it ~ why some are using Dv1's Pos-Pin on Dv2 pls?
Billet Box. Due to the nature of the connection, the v2 pin causes too tight a draw, leading to a brief moment of gurgling/flooding/leaking about 2/3rds of the way through the tank. The v1 pin has 2 deep crossed grooves as opposed to the one shallow groove in the v2 pin, which allows for a looser draw, and seems so far to resolve the issue (as of 4 tanks I've tested, plus testing by Dayloon as well).
It is only an issue for some people, and there are other ways to address it. K &Co. are using Billets with the v2 pin, and they work just fine, so not an issue for everyone.
On any other tank, the draw is ridiculously airy, unusable.