original great design by Scottdunk is here.. http://www.thingiverse.com/thing:1390579
I added battery ears onto the main body to loop the rubber bands that hold the battery slung underneath. This should keep things even lighter. I printed this in PLA and had to scale down the design by a very tiny amount so the 8.5mm motors would friction fit.
Hubsan X4 8.5mm motors
Hubsan X4 props
Nano QX FPV FC with the tiny Losi connector
It's been flying great and has fought off some ninja tree branches and even battled the side of a house! Everything seems to be great still.