Flyboy, Lancair is absolutely correct. The cooling has little to do with it. A hot turbo (Hotter than normal operation) when prematurely shut down will boil and coke up the oil at the shaft bearings. This will lead to premature bearing/shaft failure. But in your case tha turbos would be cool enough. The idling is to let the impellers come to low RPM with oil supplied to the bearings. I would continue to do as you have been. I got this info from a Garret rep at a Chrysler school I attedned many, many moons ago.

I also do not run out the fuel or use ARO. I will put some down the glow plug hole and in the carb when I am going to let them sit for a while. Like between seasons or going to a different model for a length of time. I havn't had any real problems yet.

Mark Shuman