Don Johnstone wrote:

I too know how to recover from a spin, and I don't
need to find an instructor, I were one.

Then I'm even more puzzled that you consider exploring spins in a
certified glider, which's spin recovery procedures are described in
detail in the POH, as test piloting. I always thought test piloting was
about exploring things which are not described in the POH. But then, I'm
not an instructor.

The points Ian was making was why try something that
had no useful purpose

I surely hope you don't ever make love to your wife whithout producing
children, because this would not have any useful purpose.

Stefan