After reading this thread for the last month, I was expecting the worst when my rDNA arrived yesterday. Having practiced making a dozen or so coils, I decided to stick with the contact coils I love. Using an Origen v2 Genny, I wrapped about 12 coils of 28g around a 1/8" bit, as tightly as I could. I carefully mounted it, making sure both leads where very securely attached. Then I turned off temp and set it to 4 watts and fired it while gently squeezing the coils with ceramic tweezers. Came out looking perfect. Threaded some KGD though the coil and re-checked the leads to make sure they where still secure. Set the temp to 410 and the wattage to 19 (as that is where I usually fire this set up on an ordinary VW device. Moment of truth!
Wonderful, flavorful, perfect vape. Ohms are steady at 0.18 - 0.20 after heavy use. Rarely, if ever, do I get a Temperature Protected notice. Couldn't be any happier.
I write this because we've all speculated that many more people have no problems at all than do, but they are probably not posting. Is it just a lucky build? Probably, I guess. Don't really know yet. The three things I've learned are;
- Make sure your leads are very secure. I believe that this may depend on which atty you are using. Some may just not be designed to provide a secure enough connection without cutting the Ni200.
- Firing at low, non-temp protected wattage does allow you to create solid functioning contact coils. At 4-5 watts I never even saw the coil get red.
- I believe that you should set the wattage at whatever setting you would normally vape your selected atty on a regular VW device. There was a reason you originally used that wattage setting so why increase it? The quick ramp up feature will take care of getting the coil up to temp better than bombarding it with high watts.
That's all I have so far. One build ....... perfect results. Just so people on the fence realize that this thing does work beautifully for some people.
That's why I doubled the legs to help the screws get a bite without clipping.
I knew it when I stuffed em down the chimney but was meeting the wife for supper and was out of time. It`s working excellent as long as I block the air intake and suck to prime the wick every so often. 
I will fix this in the morning. All in all I`m happy, 400 F lots of tasty vapor until the wicking falls behind and no burnt hits even then, temp protection kicks in vapor production falls off but what I get is still OK. 
