Lou no problems overheating for you I see there in the pic, I just jot back from the field , it is a mile from my house , and what a difference the idle wont go down now I have to unscrew the idle screw compared to before i cleaned the carb , a steady idle witch is nice no playing with the throttle trim. It took me 3 5 min flights to set the carb and now it sounds good, and the bission sounds grate and quiet, I did a quick check and I am spinning a apc 20x8 at 7600 with the muffler . I will take it apart tonight to see if the tygon fuel line is till on the smoke nipple on the muffler to see if it got too hot last time it melted off .