I think fairly obviously that is what we were using. I agree with a previous post that more than incipient spin recognition training on light powered aircraft is overkill (excuse the pun). On the other hand after nearly half a century of gliding, and an initial instructor course under the tutelage of Andy Gough, I believe there is definitely a place for spin training in flying sailplanes. Not least we spend a lot of time in tight turns, low and slow when thermalling down in the weeds.