APM2.x damping mount for F450

Light weight damping mount for APM2.x on F450 and clones.

Print 1x "apmV2.stl" and 2x "base.stl"
I use 4x Hobbyking "Vibration Damping Ball (65g)"

The two base are mounted with the same frame screws.

Based on http://www.thingiverse.com/thing:160655

Update: 27/Apr/2014: Replaced de apm.stl support by apmV2.stl (better design)