Hoverthings Flip dihedral motor mount and landing feet

A custom mount for Hoverthings FLIP multi-rotor arms that adds 5 degrees of dihedral to the motors for increased stability.

Also some simple landing feet for Hoverthings frames if you dont want to use the standard legs.

Build log with these used is here
http://www.bluefish.net.nz/2015/02/flip-sport-build-for-acro-flying.html