Quadcopter Motor Mount (10mm Rod) ArmaQuad

I've just started my new quadcopter project about 1-2 months ago. I order parts from various sources on Internet, but not every part I ordered has come yet. You can follow the build log at my blog http://www.cokhosumagidiyo.com

It is a brushless outrunner motor mount for 10mm. od carbon fiber rod. As this thing is a work-in-progress, there are some issues. Printing orientation changes the parts strength. If I print motor side down, the rod part becomes very weak. rod-end side down (means rot