There are some turbines out now with a single fuel line connection and only 2 wires so disconnecting is really easy. They also have the engine parameters stored on a board on the turbine so if you swap it out with an install kit all your settings stay the same.

From there, i guess it really depends on the style of airframe and how easy it is to swap. I am thinking about doing this when/if I add a third airframe.

That said, I still would not want to be without 2 turbines as I have gone to an event and had one crap out and needed a new ECU. If I hadn't had the second plane/turbine my weekend would have been over pretty quick.

PaulD