Neil,

The more I hear this line of reasoning, the more I wonder why a
manufacturer would NOT spin test their aircraft?

Money.

Surely, the increased
cost of testing would not offset the inuendo that the aircraft can't
recover from a spin?

It can. The certified method for that is to pull the chute.

Why use a chute rather than certify traditional spin recovery? They
wanted the chute anyway, so they saved money. Why build in a chute? Look
at the sales numbers.

--
Thomas Borchert (EDDH)