What was really funny was someone wrote to him saying that Fox discontinued a muffler after two years. He answered by saying that OS did the same thing and used the 40 R/C as an example. He owned one and could not get a muffler because OS discontinued them. I was reading that issue while working in Hobby Shack at the time. I turned around, took an OS 704 muffler off the spinner rack and mailed it to him. He hemmed and hawed and renewed my subscription for a year.