In a message dated 6/17/2004 7:00:03 PM US Mountain Standard Time, [email protected] writes: The 2S plans call for the center section front spars to be 2 5/32" wide which is about 2.1563". The outboard spars are supposed to be 1 15/16" at Dont forget about the vertical pieces the spar will fit between. Have you already built the boat? If you make you center spar thicker it will not fit useless you modify where it passes though. I really don't remember there being any problem when I added up the thickness of all the spars parts and when they were finish they fit like a glove. I also measured mine with dial calipers. The only difference that I can recall is the planes say 3/32 plywood but I did use the 5 ply 2.5 mm birch. That's what was sent with my kit. The thickness of my center spar when complete was 2.343 ish and the thickness of the outer spars with the wing atach fittings bolted on them were 2.343.
Chris Theroux Gilbert, AZ

