E3d Servo auto level prusa i3 or hypercube

VIDEO TUTORIAL I USED TO SET UP AUTO LEVEL
https://www.youtube.com/watch?v=awsI9bMndJA&t=15s
Update 12/5/16
fan duct rev 2: Fixed mounting ear. Removed front of duct so i can see my nozzle. The old version made hard to make sure my first layer was going down right. I added 2 nozzles to aim air at the front.
print with supports touching build plate for best results
12/2/16 Fan duct added- not perfect one mounting whole is off i just drilled one. ill fix it later this week. print in cura with supports touching build plate only.
rev 2.1 bigger servo whole

Update 11/28/16 rev 2: I've made the servo mount more narrow so we do not lose as much travel on the x axis, I had to trim it to fit the servo. so i will be making the servo hole a bit bigger so it will fit better.
I made my own servo arm. Because i could not find one that was long enough. it not perfect. I'm test printing today
Update 11/26/16: I plan on making a duct that circles the hot end.
I also plan on making extend