I'm starting to see tri-copters becoming more and more popular, so I'm asking the DIYDrones community if there is any interest in making a tri-copter frame that has interchangeable parts with the quad-copter frame.
I've put together a rough draft of a 2D laser cut sketch of a possible main board and carrier board. I think the only thing that would require some change other than the two boards would be the dome ring. The rest of the parts should be the same, and we can even use the standard quadcopter power distribution board too. I'm not very good at 3D modeling, but I'm hoping this could be a community effort.
And here are the 2D Illustrator files: