>>did any of the early builders have core distortions, or is this a more recent
thing<<
Yes we did. When we laid the cores on the spar (LE) we laid a long piece of
straight 2" X 2" steel angle on the leading edge to hold the cores straight.
Then again after initial cure of the layup to keep the LE straight as it went
through final cure.
Trouble is when you hot wire a core from a Styrofoam log, the internal stresses
are unpredictable and that's what causes the distortion.
Frustrating for everyone.
Graham
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