I'm new to the world of modifying chainsaws. I have an 036 with 16" and a 20" setups. I removed the front cover of the muffler one day and drilled two 3/8" diameter holes in it in front of the exhaust port. It got a little louder and seemed to have more power. My question is, is it safe to keep opening up the exhuast or should I leave it? I havent touched the carb yet and was wondering how I should adjust it for the mod that I have done. Thanks.