Hi George

Yours is fine. I have over 200+ on each F15 before I replace the pipe.

Check the divergence Y for any holes or crack and replace the pipe if you find them.

One of the outer wall pipe sections at the junction will break loose if there is a leak of hot gas. Then it's time to replace it right away. This acts as a telltale for me to replace it before it fails.

Also put some heat shield around the servos and top section of the rear fuselage as precautions.

Out of hundreds of F15 we have sold so far we have no report of pipe collapses so far.

Mike