I'm not Mike but the clearance should be plenty to keep your plane from coming down in flames. Have to use my infrared thermometer on my YS 1.10 exhaust but I doubt very much I'll see temps that would ignite the wood structure. Stick a piece of good aluminum tape ("real" duct tape) over the area that's close. Also, carve additional clearance space up to a quarter inch if you feel so inclined.