Only flew the JP as a student, but a great nostalgia trip nevertheless. Formation later in the Gnat was nightmare - my QFI was ex a couple of aerobatic terams, and he made it look so EASY, and I made it look so bad! I have some 35mm slides somewher of a JP 56-ship formation practice at Cranwell in about 1964/5 (practice for a graduation, I think) I flew with Ron Gillam and got some great pics. Will try and find them.