Saw a link to this on another forum https://www.youtube.com/watch?v=2H3CNxNsJnQ
Very interesting method of using a laser to level a 4x8 sheet sitting on top of un-uneven workbench to get it flat to start building a torsion box. He also shows a couple of innovative jigs for his pneumatic stapler to assure hitting the internal webs when stapling through the faces at assembly.
Thanks Tom. That is a darn good trick with his stapler. I will have to remember that.
Don in Murfreesboro,Tn.
Measure once cut twice and it's still to short.