Using a single coil on the postless deck should really have a 4mm ID coil and lots of wicking. I'd build a dual 3.5mm to start with coils close to center 1 or 2mm off the deck and enough wick to fill the juice channel without packing it in. I only use Rayon in my RTAs and it is wicked totally different than cotton, Rayon needs to be very tight in the coil and 50% or more of the tails thinned.
The postless deck is the absolute easiest deck to build and wick. I can do them on my Plus' in a few minutes, it takes longer to trim and thin the Rayon than it does to actually dry burn and rewick.
Make sure the deck is fully seated in the lower section as well, the little tabs need to fit into the cutouts or the base won't fully seat and can cause leaking. Also turn the JFC to the locked position when filling or it will flood, just don't forget to open it again or the vape will be quite nasty after a half dozen hits.
This is a video on how to build and wick the Plus postless deck which is the same as the SV2 only bigger.
If you want to find out how
NOT to build a postless deck, this
idiot does a bang up job.

