Craigslist score! Got me a sweet Solo 633 tophandle saw WITH modded muffler for $100! Note muffler mod (circled) of copper pipe brazed over muffler outlet. The kill switch doesn't work, but I bet I can fix that, choking it to kill it makes it tricky to start cold. It also has an accelerating idle, if it is idling while I am using it it keeps speeding up. I think whoever modded the muffler didn't re-tune the carb properly, I sure hope it isn't crank seals. Either way, a sweet saw for $100!