Zor - SIG told me that it was a "wood specification" that needed to be upgraded. If I understand that statement correctly, it was built with a lower quality grade or perhaps smaller in dimension than it should have been.

Also, the manufacturer used hot glue. It's my understanding that hot glue creates a "bond by interference" joint rather than an "bond by absorption". Every time I handled the wing or fuse and heard a faint "crack", unknown to me but a joint has just failed.