As far as "buttoned up and only along for the ride" I was wondering this yesterday. If you need an emergency shut off and your canopy is screwed down and the turbine is running it will take awhile to get to the Festo ball valve.

Is there a problem (other than what Todd said about being on the "pressure" side of the pump) with having an extra Festo ball valve at the back of the plane (out in the open) in the fuel supply line before it gets to the turbine? That way even if it is "all buttoned" up a person can still quickly shut the fuel off to the engine knowing though that if there is a fire back there you may or may not be able to get to the valve.

Thoughts?
Don