"Boo" wrote
Less than 40 were built, and half a dozen lost major
sections of the wing in flight.

That happened in the early stage of development, right?

Uh, no. It wasn't in development at all. These were all
customer-built aircraft.

Those problems were solved in the current version.

Not that I know of. AFAIK there has not been either a reliable FEA
simulation nor a long term cycle test to indicate that the 'solution'
actually fixed the problem. Nor has there been a long-term field
history.

Michael