...or you could blame the guy that drew the plans. I bought a full wood kit from PCK (Larry Katona) and it was beautiful; parts matched plans perfectly-only problem was the plans had so many flaws it wasn't funny(M.A.N.); holes wrong diameter in wrong place for wing dowels-all three places; had to trim lots of parts to size. Very disappointed. Lots of opportunuties for the design-it-yourselfers. Jim