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It would appear though that Jabiru, more than any other company in modern times has used the end customer as the R & D dept.
Fair go Bob. What about Lycomings little frolic in metallurgy when they altered the metal alloy used in their crankshafts to make them easier to machine with c&c machines. That killed quite a few people and cost our industry millions.
Then there was Continentals effort to reduce oil consumption by increasing the ring pressure against the cylinder walls. That experiment virtually stopped oil consumption but wore the cylinders out in about 400 hours. Yes you guessed it. Just out of warranty. Another R&D exercise that cost owners millions.
Neither Lycoming nor Continental came out of that smelling of roses. Their efforts to avoid rectification were disgraceful.
Both events occurred within the last 20 years.