First I started with the power distribution wiring, all of which was salvaged from my hexacopter build.
Three arms were cut and drilled from 10mm aluminum tubing.
For more information on flashing the ESCs see my tutorial here.
Using the standard supplied mounting hardware and some M3 bolts, I mounted each of the motors to the arms of the frame.
After completing the arms, I cut and drilled two frame plates from sheet metal. I also secured the top mounting plate, loading pipes and landing gear from my Xaircraft DIY frame to the new Y6 frame. Before bolting the two frame plates I connected all ESCs to the power distribution harness and concealed the wires between the two frame plates.
Finally, I secured the ESCs to each arm using zip ties and completed the wiring of the ESCs to each motor.