Square tubing quadcopter

This is my first ever medium scale RC aircraft so I decided to try to make it durable and easy to repair.

The base frame is 3/4 inch aluminum square tubing to create the X and all other support pieces are printed ABS.

Using MultiWii platform: http://www.multiwii.com/

Loosely based upon these videos:
http://www.youtube.com/watch?v=7DHoLYf5pMA

Video of it in flight:
http://www.youtube.com/watch?v=Z1z6sDt9_qk

Update 8/30/2013, added FPV components.

Lighter weight version using