Both of my ADV's are 'reduced PG', which if I understand all I think I know, is Vg with the only Pg added being what comes with the nic/flavorings.
That said, I've used Protank, Puritank, T3, nautilus, and probably some other tanks with my ADV's without much of a problem. I currently use a KF 3.1 without problems. I vape a single 2.5 ohm microcoil with cotton wick and normally @ 7 watts. The only times I've had issues with gurgling or a dry hit is when the airflow on that particular tank was not set properly or the tank was in bad need of a rebuild.
I've never added any kind of 'thinner' to a juice.
That's my story, YRMV, Good Luck
OBTW been vaping my ADV's for over a year now.