As suggested above by me I have added a brief reference to Shamarpa's remarks about the Bodhi path and Nydahl  in the 'Criticism' section directly after the sentence concerning Nydahl sleeping with his students. I'm not sure the euphemism 'sleeping with his students' is very satifactory but leave it assuming good faith. If the reference to Shamarpa's letter proves contentious I can provide an expanded version should that be more useful.