Hi Gordon

I'm a little puzzled with your reference to the support ring on the pipe you have for the Hunter, on mine the support ring isn't welded on and is free to slide along its length. My pipe was also a little longer than required and I have trimmed it to size so it sits 3/4 inch inside the rear fuselage with the bell mouth mounted at the front of the rear half of the fuselage. Even though the pipe is divergent and I had to cut off, from memory, about 2 inches there is no play at the support ring and I have lagged the pipe with ceramic blanket.

IB