I'm curious if anyone can comment on what the parts availability for
these two engines is. Are they becoming too rare to maintain
adequetely? Anyone have any experience flying behind one?
I saw a Heath Parasol at OSH that had an A-40 and a Porterfield with
an A-50, and I recently picked up the book: "Flying with 40 Horses" by
Chet Peek and was curious if anyone out there still flies with these
engine, or have they all gone with C-65's?

Thanks,
Ryan in Madison