Thanks Andy, I didnt realise operating temp actually directly related to the engine cooling. Seems from reading the manual the engines also aren't really able to wait at the holding point for too long either, but hey, neither do I!! There are a couple of J230s at Emkaytee strip just outside of Darwin, am trying to get time for a test flight in Jan, however after searching through adds for 1970s model C182 and 172s for over $100,000 for a reasonable one, Jabirus are looking great.