Here is my tricopter build. Its a combination of V1 to V2.5.
This is what I have used:
9×4.7 GWS Blades (really needs 10×4.7)
2.2 Lipo 3 Cell
CNC Cut Lighbounce Acrylic Frame
10.5x18MM Pine Stripwood Booms
Plush 18A Speed Controllers
3D printed YAW hinge, motor mounts and GoPro Hero 3 Frame
Sintra Plastic Battery and GoPro Holder
Flies very well, I always you self level on.
Here is a little video showing the tricopter: