Weston Magnum - Destroyed on First Flight!
After reading back through what I just wrote it sounds like it crashed on launch. Well it definitely wasn't a launch issue. After launch it did sag down quite low to the ground but was up and flying well after this. When I said a few seconds after launch it was probably more like 10-15 secs. The plane was definitely flying and was reasonably high when control was lost. Then it just went in.
I have all of the pieces in a bag in my workshop and I am about to go out there and sift through it for any clues.