Good morning Chaps, thanks all of you for the suggestions.

I forgot to mention that my XL is the older Mk 1 version, and I added some mesh on the intakes as a FOD guard. I might have to put some NACA slots on the turtle deck if the air intake is restricted. I think I would be better off with a FOD guard on the turbine, as there is always the risk of a loose nut/bolt/washer lurking inside the fuselage !

I'll keep an eye out for high EGT and it's good to know that the plane is not sensitive to CG, so I can move the turbine back a bit if I have to.

With a bit of luck I won't have to change anything. I'll do a test run next weekend. I get 2 days off for Easter holidays, yippee