I haven't really dripped much in a year, but this thread provided a "light bulb moment" What I came up with uses 4 parts.
Protank /w single 4 turn coil. Protank beauty ring. modified 510-ego adapter and a mouth piece from a dual coil mega Ego carto.
I cut/ground of the 510 part of the adapter (not real pretty).
Thread the adapter about two threads into the top of the ring...
Remove the vent tube - seal from the PT head and screw the beauty ring on to the PT base (right over the coil) ... it will tighten up the adapter too. the adapter creates kind of a chamber...
Drip 3-4 drops pop on the mouth piece and vape!
I haven't notice much leaking. First pull after loading gurgles a tiny bit... but the draw is good. I think I will use this to test juice next time instead of my trusty 306. Not bad for stuff just lying around...(talk about a cheap RBA)
Thanks Wizzlefits for the inspiration.
D.