Just tried my first Ni200 build. It was..nervewracking. I've never been a subohmer and never thought I would ever be shooting for something as low as .15. Pbusardo's site today said that Evolv changed their "typical" build to a .40. I looked for this information to see the source but I was unable to locate that. Anyone have anything on it?
I did as many wraps as could fit in my KFL+ ..literally, to the brim. Came out to be 11 wraps of 30 AWG Ni200 around a 6-32 screw (thanks Choppa - it really did make coil spacing even and a breeze to work with..could even screw the screw back into the coil). For reference, I believe a 6-32 screw has an ID of about 3.5mm. Sucker was in there TIGHT. I made a complete 360 degree wrap around the screw heads, too, which I don't do with Kanthal but it really did provide added stability to the build. Came out to be .23 ohms (shudder).
Then, I had to run my KGD cotton like a snake from the edge of the build area down to the base of the build deck on both sides. I worried a lot about the cotton bending the coil too much but to my surprise it did so only slightly.. The chimney base barely fit on it (lol) so I decided to push the cotton into place after screwing down the chimney base. Then, I juiced it up with some local B&M Watermelon Rancher (60/40 pg/vg). No use wasting the good stuff in case this thing won't fire. Screwed it on, said a prayer, and set TP to 420degrees.
Results: It vaped, to my surprise. I noticed that the harder I suck on the drip tip to force air through the little stock KFL+ air holes, the better it was able to maintain higher watts. It capped out at 15 Watts with me sucking like a madman. (insert more sex puns here). With my normal air draw, it handles right around 11 watts, which is what I generally stayed around with my Kanthal build. No error messages..no issues with the OHMs flipping I think with the airflow provided by my KF4, I'll have a lot more wiggle room to go to higher watts if I want.
Thoughts: I don't like twisting wire..I think I will eventually try it but with these results I'm pretty stoked. I'm more interested to see how it plays with more airflow. I also want to see how it handles higher VG juices (70-90%). My thinking is that it will hit TP (all other things being equal) faster because a thicker
juice generally wicks slower, but perhaps using less cotton might remedy that, too. I've also gotten exceptionally good at reading digits backwards in the mirror.
Update: 10 minutes after writing this post, I picked it back up. Ohms were at .21. No worries there. But, I do notice that it's hitting TP a little more at 11 watts. Vapor production is generally lower. I backed it down to 10. Still happening. Reflecting on the matter (in the mirror) it looks like it's knocking itself down to 8 watts, then 7..TP flashing. Ruhro. Either my wicking or my build wasn't so great after all
Back to the drawing board.
best way to learn imo. maybe look a few pages back and just try to 'simulate' one of the posted ni200 pictures. then let us know how it goes 
