I have The TT 46 pro on My Pizazz. It hovers at about 1/2 throttle. KE are to be desired, but My Pizazz has been repaired a few times (I htink Im a lil heavy). I have a Sledge wi=aiting for covering. when its done, the TT will go in it, and Ill hang up the Pizazz for a while. I believe the 46 pro will hover the sledge at under 1/2 throttle. I am running a stock muffler on it, but have intentions of building a mouse can or ordering the tower pipe. dunno yet. Will see when the plane is in the air. BTW I built mine in about 3 days working 1-2 hours per night. It goes together quick.