Hint: Look around Hay NSW, especially local NRMA agent who owned one and may still do. As for the IO 720, ask around Griffith NSW or anywhere for local AG operators who operate them. Not having flown one, I can't give any credible advice, but like everything else once the limitations are known and the handling done by the book these should be not many problems. Tales of the rear cylinders burning out usually come from those who have been mishandled. There are plenty of the engines around in quiet a few aircraft. I would say it's not an engine to experiment with. Rather costly I would imagine.