Dear DFC:
1-I didn't specify any exercice number on my post, i did say though, effect of controls, keeping it very simple, so not the whole exercice brieffing, just the basics for the person to be able to have the controls during the flight..
2-Nobody is trying to make legal anything, but for sure, if you wanna have them on the controls, even if it's for a few seconds, you need to BRIEFF them on how the controls work, wherever exercice that falls in shouldn't matter much.
3-Brieffing the person does not make the trial flight legal, in the other hand , not brieffing at all will make it ilegal.
We are not discusing the legality of trial flights here, and my comment wasn't intending to discuss the issue with you or anybody, the comment aimed to make sure whirlybird knows what is at stake if he does not brieff his potential students before the flight.