I have three Aromamizers and when you have the deck screwed on snug, the four air holes are not lined up the same on each deck.
The first (a 6ml), the four air holes are unrestriced but ony just, it works great with horizontal coils but better if i unscrew slightly till the posts partially blocked two holes.
The next, (a 6ml), the coil posts partially block two of the air holes, this too works great with horiozontal coils as the two unblocked holes are direct over the coils.
The third, (a 3ml), all four holes are open but the posts are half way between the posts, this means all the air flow holes lead direct to the wick tails and i find the draw tighter so have to loosen the deck a smidge (quarter turn) till two holes are blocked and boom... i get the same vape as the other two decks.
Now i normally build horizontal coils and in the atties that have all four holes free, i find the draw tight and have to undscrew the deck a tad till two of the holes are blocked, especially the 3ml, this means the two holes left open are directly pointing at the middle of the coils and i get a great vape.
Now i tried Vertical coils before using dual twisted 26awg TI, 2.5mm coils and was not impressed, less flavour and vapor compared to my horizontal builds, but now if finding SS working better than TI and you guys shouting the praises of verticals, i have stripped down my 3ml and put in dual 25awg 317L SS spacd coils, as this tank lines up the airholes near perfect for it, i can look through each hole and see clean through to teh opposite hole and daylight, but can see the edges of both coils too.
Have to say, still not sold, i still think horizontal is far tastier and warmer especially if you set the deck so Two air holes are direclty pointing at the coils and the other two blocked or Half blocked.
I just dont cant get as good a vape from verticals on this tank, on the OBS Crius Yes.. not not the Aromamizer, its airy enough but cold.