I had the real chance to run the Solo 694 ( that I purchased from Jeff Sikkema) today. When I had it out with my Dolmar PP7900 a few weeks ago, the Dolmar PP7900 seemed alot more ballsy than the 694. Since then I relieved the muffler of it's baffles. It is a wonder the saw ran at all. The muffler had a square tube with about 20 3/16 holes and a small slot too. I cut the whole front and bottom out of this baffle and added another port about 5/8" big. This really woke the saw up. Feels alot like an 066.