On the advice of some folks on this site, I opened up the muffler on my Poulan Pro 295. I just opened up the port on the rear of the muffler to the size of the recess, and hogged out the 2 vent type ports so they are maybe 60-70% the size of the exhaust port, then drilled through the baffle from bottom to top. It made a big difference to the power, though it is still nowhere near my 024 super. I still don't think I could bury the the bar, but I think I'll leave the 20" bar on just for reach. I riched the mix up, and it seems lots happier. How far should I take this? Should I drill into the muffler for more area, or be happy with what I got?