I am interested in doing some Arts & Crafts projects. I would be using
quadrilinear Posts. The thing that worries me is everything I read talks of
gluing 4 boards around a center post, making what looks & feels like a solid
post capable of taking mortises etc, but why doesn't the center post cause
some failure in the glued post? I would have thought seasonal movement on
the internal post would exert pressure on the miter locked sides?

Chris