Will add a different perspective, if that's ok with y'all?
For what it's worth, I had a rush of blood to the head last week and decided to buy one of these for a change. I've been using pre-built stuff for the last year or so and wondered if I'd been missing something.
Never built a coil in my life, but what the hell, might be an interesting route to go down.
Anyway, also got a Coil master kit and some Crazy Wire 216L, 0.5 mm stainless wire and thought, lets give it a go.
So, wrapped some coils for practice, then, having figured out the correct leg lengths, stuck a couple (parallel coils, 9 turns, 3.5mm internal diameter) on the (very easy) deck. Parallel staggered SS, resistance 0.26 ohms, which did not seem too extreme - there are lots of tutorials on youtube, but there is no substitute for having a go yourself and seeing how it works out.
After a bit of practice, I had a couple of tidy coils neatly positioned (getting the leg length right is the most important thing), so pulsed them for a bit to see where they heated up. A wee bit of footering, mostly positioning on the deck and yup, going gently red from the middle when heated (after a bit of pulsing - apparently you don't want to heat SS to extreme levels when doing this). Recheck resistance when they've cooled down, still 0.26, so now put the thing back together and check again - should be the same, otherwise you might get a short, but still ok. Right, wicking - did that kinda with hope & a prayer - coil internal diameter is 3.5mm, so did it by eye, about 10mm cotton strips with the top layer peeled and just pulled through after putting a wee taper on one end. Usual look for the bit where it pulls through with just a little resistance, trimmed to just get to the bottom of the juice well and poked it in and primed with 80/20 vg/pg juice. Stuck the deck on the mod (Asmodus Minikin reborn) and dialed 35 W power to see what happened - nothing much. Upped to 55 and nice spitting out of juice, so assembled the tank, checked resistance - still good, and tried again.
Right, this is an SS coil so try Temp control to avoid dry hits from my naive attempts at wicking the thing (I'm sure I've overdone it a bit, and will try harder next time) - 415 deg F and 78 watts, as recommended by Steam Engine.
What happened? I had previously used a Crown 3 with the 0.5 coil, and quite frankly, this build is in the same league. Bit cooler, but just as good.
Tons of clouds, tons of flavour.
So why post this? Well, if you like sub ohming, and fancy trying an RTA for whatever reason, the Geekvape Blitzen is not a bad place to start, and if a completely clueless person like myself can manage to get a good result out of it (albeit with some time spent researching stuff and getting decent kit to build with, also possibly some beginners luck) in a few hours then it might be worth a look if you want to dip yer toes in the RTA waters. There are plenty of resources out there to help, after which it is up to yourself to pay attention to all the caveats and safety considerations.
10/10, a nice, noob-friendly RTA IMHO. I've become a convert, and will hopefully do a better job next time.
Cheers All.
