I know this is sore subject.
Our local club field requires use of a reasonable muffler on most days.
I can get a lot more practice and test time if I use a muffler. This will be on a Speed limit, fast sized foamie, with a 25 or and F2d With a a 25.
No landing gear or place to put it.
I know I will have to add tail weight.
How Do I protect the muffler from tearing up the airplane every landing?