Dear MattK
It is very useful. I am going to tell my friend who is struggling to tight his E40 tube to Hatori header. Onece he tried to fit those with a silicone tube. The tube was not durable enough to withstand the hot and high pressure exhaust gas. Thanks for your sharing a great knowledge.
Also congratulate you on your successful F3A flight with OS GT33. Mine with GT 33 is also very powerful to pull a heavy airplane weighing slight more than 12 lbs. My custom-made composite plane is tail-heavy. I have no idea how to reduce my plane. But it is still powerful to pull straight up without any hesitation. Regards