where did you get the info that Prime 15 is 100% PG? i have been wondering what Prime's ratio was, but my guess is closer to 80PG/20VG.
also, all 4 of my 2.4ohm heads have been reading 2.9ohms on my provari. its no big deal, its just somehting to make adjustments for. the 2.8s come in at a solid 2.8, but the 2.4s are all coming in higher. the 3.2 is pretty solid too. ive tested 2 of those so far and one was 3.2 and one was 3.3. i havent tested the 1.8s yet.
OP, IMO your taste will improve after the break-in. prime tastes different to me in a
tank than it does in a carto. most flavors taste more pronounced in a tank, but with prime im noticing almost a flavor-morph. prime in a tank gives me a bit of the Torque flavor. not sure why, but it does.