First off, I have new OS 40 FX, it has been broken in, but has not logged much flight time, how long should I wait before piping it? Also I have been told that the mount for the muffler is the same for the 40FX and the 46 FX, is this true, because I cant find a Header on Towers web site that specificaly calls for the 40, but they have one listed under the 46, by the way Im looking for the MACS setup, for my Shrike.

Thanks

Tony