We lay things out on the bench so we get our heads around mirror images.
The most frustrating thing is the way Vans label parts L & R. This does not necessarily mean it relates to a left wing or right wing, it normally means which way a flange or part faces.
That drove us to distraction on the RV12 build.
We were certain we had insufficient ribs until the penny dropped.
I am on my 5th build and only this week had to de rivet an aileron end plate because my build buddy passed me the wrong bit and I failed to cross check....
For the sake of one extra page, a snap or lay out of the mirror would be so helpful.
And Vans..... Please - revise the 10 plans - they are pants