I am interested in learning how to build an 18mm motor mount adapter that can be used in a 24mm motor mount. People have mentioned using this type of adapter in a couple of threads - how are they built? I haven’t built a rocket since when I was into them was a kid. My five year old son and I plan to install the "Estes D and E" 24mm motor mount kit in a Big Bertha kit. It would be nice to have an 18mm adapter so I can fly the smaller engines on windy days. The salesman at the hobby store did not think that Estes has ever sold an engine adapter kit. Please share any thoughts that you have on how this could be done. PS - Great forum!