Please use this file http://www.thingiverse.com/thing:480261
it prints much better. Extra geometry has been removed.
This is a mashup with of Spyda 500 Quadcopter by Gyrobot http://www.thingiverse.com/thing:160607 and Omnimac 3DR APM Anti Vibration Mount by Tastywheat http://www.thingiverse.com/thing:160655
My goal was to create a top plate with anti-vibration mount built in to decrease total piece count and weight of things I need to put on the copter.