Give it a break
Gee menen
Give the guys a break. They try, you say good things then you have a go. At lease AOPA tried.
I think the Katherine Gorge and GBRMPA debacles give you the clue. Don't pay. Also, ask AOPA for a copy of the letter, remind Avalon of it when they come after you.
They don't own the sky and cant charge you for using it!!!
Pat