I am getting ready to do this exact thing on my new essence. As mentioned, Herbert triangulation publication is where Iam starting. Down thrust is the point for all the rest. Negative 1 degree will give me the anchor point. Then i will check wing incidence and then ffs to make sure its at 0. I put it together making sure I used the BJ incidence gigs. We will see where it is. I also used a string around wing mounting bolts to get the cg close to know where the battery tray should be which ended up much further forward than the picture on BJ's website showed. Maybe because Im using direct link to rudder. When all is about right, I'll flip it over and use the cg gig to finish that part.