Hi Paul,
Glad the advice was useful. I think you're right that the central thing you could think about is your role as 'sage on the stage' or otherwise. Unfortunately my experience of IT subject teaching is that students aren't happy about being reflective - you may have trouble getting them to accept that you are not the sage on the stage so don't be too tough on yourself if it doesn't go fantastically well.
Keep us posted how you get on!
All the best
Richard