This is a really clean saw that Ive had for a couple years, I find it very handy, but always felt like it had a little more to give. The piston looks brand new, I think it's a very low hour saw. I cant see how to open up the muffler without soldering or welding tools. Does this have a catalytic converter? I cant see an easy way to open it up with the tools I lack. Any one ever messed with these mufflers? I think the 306, 341 and 346 may have the same muffler? Thanks for you brain