Cline suggested that I nestle it right under the carb and secure it with a tie strap. He did not mention anything adverse about a hard mount and I can vouch for the fact that it works flawlessly. My fuel line is only about .5" between the regulator and the carburater inlet. A friend uses one on his OS1.60. He lets it hang freely right before the needle valve. Yes, behind the needle, not by the carb. It too works flawlessly. Let it hang, attach it to the motor, they both work. This cat seems to be skinable in several different methods.

Mark