I got a couple of cheap RDAs to practice doing coils. If it doesn't turn out, you do not have to go through the mess of siphoning out liquid from the tank to try another rebuild. Riptripper has the best vids I think on youtube. I would highly suggest at least getting the Tobeco clone. I got a no-name knockoff I had trouble with, had to replace O-rings (that were not included) One O-ring I stole from the Tobeco extra's (for the bottom of the tank to deck connection). The top cap had no O-ring at all (the small one that seals the top of the chimney), I bought an O-ring kit from Harbor freight and it just so happens one fit perfectly. Also, the Tobeco you do not want to block the channels, the no name knockoff had serious flooding problems so I had to fluff up the cotton and block the channels and it is finally working (still not totally happy with this thing though). The Tobeco is not bad, but you have to totally remove the airflow control screw or it whistles. You do not need it anyway unless you like a tighter draw. After my experience with these two clones, I think the vaporev original is really the way to go. If you are like me and like to change flavors, you will need 3-4 which can get quite expensive buying all original so throw a Tobeco or two in. They are adequate enough.
One important thing to note: I do not oxidize by torch. I attach the deck to a mod and work out hotspots with firing and tweezers, when I am through, I pulse to get them nice, hot and red more than a few times, and a few times more at full 10 second intervals to make sure that the coil is completely oxidized. That way I do not have to go through more than 2-4 vapes before it starts tasting "non-burnt".
28 guage at 10-11 wraps will give you around 1.3-1.4 ohm's which is a bit hot for some of my liquids, but pretty much dead on for my lower nic, bakery type flavors. Tobacco type flavors I prefer 1.6-1.7 ohm's (around 13 wraps on a 5/16 drillbit). If you have a VW mod, that would be about equal to 8-10 watts. The Kayfun lite has a pretty heavy throathit so do not be discouraged, just tweek the power and/or resistance until you find your medium.
I was a total klutz at first with micro-coils, but it did not take long for me to get the hang of it.