Decide how you are going to handle motor retention before you start
working on the motor mount.
Put some kind of flame protection on the shouck cord between the motor
mount and piston.
Fiberglass the inside of the piston.
I had one of them and it flew great with and without a payload bay.
Keep the piston, but build it upside down. This saves precious room
inside the airframe and it works just as well. And as someone else
said, if you can, glass the inside of the piston. The tubing likes to
crack after a year or so.
Also, wrap up your schock cord with nomex.
"I leave punk rock on for my cats so they'll get more hardcore while I'm
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