Glad to hear, can't say enough how much I love the dual RBA deck. Got some twisted 26g Kanthal in it running .2ohm, it honestly feels better than the quad coil for me personally. Thicker vapor production, can't quite get as much as the quad but the hit feels more pleasant in a completely unpleasant actually tickling my throat kind of way (something I like and miss from smoking), and also a tad warmer but it's not burning like my single wire coils were late in the draw.
Anyways, the RBAs are fun and while you can certainly get some wicked cloud production and solid taste from the prebuilt coils I do prefer the RBA's.
Also,
http://vapingunderground.com/threads/new-tfv4-vertical-coil-rba.141246/
Was fun and worked quite well, waiting on some new wire to try to perfect that vertical thing and I need to borrow my brother's dremel to get some more juice, but without making any modification to the casing I was able to do a vertical coil just wicking a strip of cotton from one juice well around the coil twice and into the other well and had a pleasant experience with it. I'm sure I can improve on it, but it was solid just with that.
One tip on wicking the RBA, get your wicks in (should be able to gently pull it through without much resistance, too much cotton and it's likely going to have issues), leave a fair amount on each side, then push the cap down and it'll put indents in the cotton. From there cut diagonally across that such that you have the tip going down the juice well while the other end is about at the top of the juice well, this leaves plenty of room to let the juice get up in there but it's still in there to prevent leaking. Then prime it up and push those ends into the juice well so it lines up and you can screw on the cap easily. Doing this I don't have any leaking (had it once or twice when I didn't leave enough on the ends) and I can use max VG without any wicking issues. Seen a lot of comments about leakage, but like I said never really been a problem for me except when I was doing it wrong (cutting off too much cotton).