F.L. Whiteley wrote:

"F1y1n" wrote in message

snip
amplitude and frequency does depend on the CG and gross weight, sure,
but a spin within the CG in an approved glider with a standard
airworthiness certificate is always benign can be recovered using the
documented procedures. As I said: 'well-behaved' and 'predictable'.

Not true. The official procedures for weight and balance
miss a lot of subtlety. There are those who believe
this is what killed Art Scholl...

Think about it...