About this 3D model

New design of the arm for using famous HobbyKing's DT-750 motors whit this amazing quad. Designed in SketchUp. Source file available for download. Test flights are in progress. I will update with results. 4-Aug-2014 (v1.0) -Enlarged 0,5mm the place for the motor base mount. Where to buy this engine: http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=6247&aff=7235