Knuckle H-quad with walls for 10mm booms

This project is inspired by Flitetests Knuckle H-quad.
( http://flitetest.com/articles/knuckle-h-quad )
that tophe75 made pritable
( http://www.thingiverse.com/thing:163794 )

It is essential to get the booms perpendicular when building an H-quad. Since my printer is a lot more exact than me I wanted to use it's prowess to help me get it right. Thus the knucke-walls was born. The walls holds the 10mm booms in place making assembly easy. There is 1mm gap between the two halfs if you want