Whirly, if I may answer for you.
coyote:
Mike Green has squillions of hours, a large proportion of them instructional, and a large proportion of those in the R22.
Pete Vellacot and Tom Saunderson have thousands of hours apiece, loads on R22 instructing.
I'd feel safe with any of those three showing me something new - mostly because I know I can say "I'm not happy with this" or bacause I know they'll monitor me closely.