I used Van's highly calibrated method of setting the wing incidence. This consisted of duct taping two 2x4's to the back end of a carpenters level. There should be a 3" drop from the front spar to the rear spar. With this device, the level should be perfectly level when the incidence is correct. I used the digital level on top of the carpenters level to make sure this was the case. Both the inboard and outboard sections of the wing came out perfect,,,zero twist! Once the incidence was set, I double checked the plumb bobs to make sure they were still in alignment and then I finally clamped the rear spar in place. All of this effort to drill one hole in the rear spars of each wing! The good news is that I have plenty of edge distance,,,well within the 5/8" required minimum.
Right inboard wing incidence perfect
Right outboard wing incidence perfect - zero twist
