The Crossfire has now been updated, check it out here for the new and improved version http://www.thingiverse.com/thing:234867
This is my version of a 3D printed quadcopter. I designed it from the ground up for FPV, but it will work equally well as an aerobatic quad. This quad had been under development and testing over the last few months. Thanks to a lot of input from the members of this site I have decided to publish it as a finished thing. That being said I will continue to develop and add components/ modules for this quadcopter in order to make it more customizable. I am also in the process of designing a tricopter and a hexacopter. Many of the components will be interchangeable across my line. Print, fly and enjoy. As always input is always appreciated. Thanks everyone for all the support.

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Video Link:
http://vimeo.com/79370836
http://vimeo.com/71358538

I sourced Most of this stuff from Hobbyking, but try http://www.getfpv.com for your electronics. They are a great one stop shop for multirotors and FPV.

Electronics List:
Motors - RCTimer 750 Kv

ESCs - Turnigy Plush 30A

Battery - Turnigy Nanotech 3S or 4S 4000mah

Flight Controller - KK 2.0

Update 11/14/13: Just uploaded a video I shot of some BASE jumping. Check it out if you are wondering about a gimbal.

Update 8/14/13: If anyone if looking to use a CCD camera instead of a GoPro check out this thing http://www.thingiverse.com/thing:133200

Update 7/30/13: I've edited together a video of the print and some flight with my quadcopter. It's long overdue but hopefully it will inspire some people to give it a shot.

Update 6/30/13: I have deleted the links to HobbyKing.com because their links always seem to change. A quick search for any of the components on HobbyKing or google should return good results. Sorry for the inconvenience.

Update 5/20/13: I have uploaded the .SKP files for the quad. Have fun modding and tweaking!

Update 3/18/13: Added the Bottom Plate for use with the Tube spacers. The only change was a new set of holes on the Bottom plate.