It's actually very easy to build, but you gotta be gentle...That little In'Ax Nano looks pretty cool.That would make a great backup to keep in the glove box,especially being it's just over $10,that atty looks to be a pia to build on though haha.
Place the ceramic wick sleeve over the center pin. Make your negative connection with your wire (30 ga here) under the large, flat tip screw head. Wrap the wire around the ceramic wick sleeve four or five times. Drop the wee tiny spring coil on the end of your wire and seat it gently onto the tip of the center pin. Snip off excess. Drip and vape. Five minutes, tops, to a decent build.