I have found that my Calix V2 (which has a P3 threaded version available) can be closed down completely where you can't get any air at all, and I found the same thing with my Erlkonigin. The Mark Bugs Gem can also be closed down nearly all the way.
Among those three, I find the Gem the easiest to build on, but I prefer the Erlkonigin for it's light weight and flavor - it's the atty I turn to most often in my collection.
As far as coil jigs go, I find them pretty useless. Honestly, after a couple of times you'll find that using a drill bit or small precision screwdriver is actually easier to manipulate. But if you want one to start out on, the coil master kit with 5 different sizes is readily found on the Bay pretty cheaply.
I think you'll be surprised at how easy rebuilding an atomizer is after only one or two tries, Jim. Once you get a good coil built, it will last for months and will only need a dry burn every couple of tanks to clean it up, and changing out the cotton for a new wick takes about 30 seconds - bam, new coil. A nice bonus is the fact that every juice tastes much better than in your typical Nautilus.
