Summary

Designed in SketchUp.
This quad can fold up into a 12" x 8" x 3" envelope.
Extended, this quad becomes a 450 sized frame.

Instructions

The wood used in this build are 1/2" square dowels.
Each boom arm are 6.25" long.
Each motor mount is attached with the foot with M3-25 screws and nuts.
Each boom arm is sandwiched between two frame plates and attached with M3-25 screws and nuts. (Make sure the slotted sides are facing out.)
The battery box (below the copter) and the brackets for a NAZA are attached with M3-12 screws and nuts.
Motors are attached to the motor brackets with M3-8 screws.
ESCs are ziptied to the boom arms.

The quadcopter comes in at 30oz with battery.

Folding 450 Quadcopter