At 07:41 PM 2/21/2015, you wrote: >has the strength ever been questioned of this design, spars or >anything else? +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Yes, many times by many people, especially the WAF's, but nothing to do with actual aircraft has indicated any structural weaknesses anywhere in the design. Build it correctly, fly it with common sense, and you won't break it. Larry Flesner
