I bought a 50cc Craftsman chainsaw with a 20" bar recently. I am actually pretty impressed with the saw. I've been through 10+ cords of wood and the only thing I've done is put a skip tooth chain on it. It cuts great but have heard that doing a muffler mod would increase my power. I am quite versed in adjusting carbs so I understand that if the muffler has better flow, the carb needs to be tuned as to not go too lean. I've heard of people just basically doubling the amount of holes in the muffler all the way to adding welded in pipes. I would be more inclined to do the less obvious mod. Any help on how to go about this would be really great. I called sears/craftsman and the the motor/drivetrain is a husqvarna 50.2cc which is the same as a husqvarna 450. Thanks in advance for the help.