Looks great! How much did it cost you for parts and how long did it take to build?
8 bucks at madvapes and a few dollars at lowes.
You need 1 3xAA box
1 LDO 5 volt, 3.0 amp regulator with control pin!
1 3ml bottle
I had some 20 gage hypodermic needle tubing laying around from past mods but you can get that from amazon.com
all in all probably about 15 bucks including the cost of the mighty putty to seal the bottle to the 510 connector. I do it highping style, not wetbox style.
As for time it took most of a day, but that was in between working and taking care of a sick kid. The most time consuming part is soldering all those wires to the pins on the regulator. I couldn't fit a circuit board in there.