That might be possible, some classes are better then others as I let the crowd dictate what i do.
The last on 3-4 years ago I did a one hour class on fixing of the endure bumper and they said my class was the in the most demand but after took some questions we were out of time.
So when they called this year I asked for three hours but they gave me two.
This year, I'm giving everyone a form and telling them to write ONE question, they want answered and I will just go down the list.