I fabricated the hinge brackets and actuators from the materials supplied. I made a mistake on one of the actuators. I cut past the hole into the vertical leg of the angle. Just what I was not supposed to do. I have ordered a new piece of angle from Van's. It should be here next week and I can try to fabricate the part correctly this time.
I match drilled the counterbalance tube, then riveted it to the support ribs. I then clecoed the forward skin over the counterbalance tube and match drilled the #30 holes in the tube and the support ribs. I then removed the clecoes and proceeded to deburr the newly drilled holes and the edges of the forward skin. I also separated the bracket arms and deburred the edges.