Gerry Farell reminds me of an article that I referred to earlier,
but which is still relevant even with our tails:
http://www.fai.org/hang_gliding/safety/rigidwing_spin.asp.

In order to develop effective strategies for the prevention of
spinning it is initially necessary to recognise when, how and why spinning
occurs. The following points have been put together with the aim of sharpening
the awareness of rigid wing pilots - firstly to help them analyse their
instinctive and conditioned responses learnt from flying flexible hang gliders,
and secondly to help them change or adapt their reactions and responses
accordingly. Additionally, specific constructional details are highlighted which
can result in an increased susceptibility to spinning in rigid wing hang
gliders.