Good points made all round, I escaped the creamy bit, and got the QWI qual instead. Duly had a nice instructional tour on F15, as a Pilot Instructor, without having to do any of the CFS stuff. Teaching pilots to fly the jet was very much easier than teaching them to operate it.
Dear Ken Hair visited me and was very distressed to find I was teaching ab-initios on the F15 without being a QFI!!