I started the longerons. First thing was to read the plan and drawings until I had a good mental image for the orientation of everything. That took awhile. Then I made sure I understood the called out lengths. Lengths given are for un-bent longerons.
I cut off the patter from drawing 17A and glued it to carboard so it stays stiff and useable as a template. I laid the longerons on the floor and measured them with three tape measures until I was convinced I was getting accurate and repeatable measurements.
I laid the canopy deck against the template to see if they match. Hole 11 aligns with one of the distance measurement points. They match.
I hunted down the other parts I'll be needing including the aft deck.