There have been a few discussions on the new Stihl 361, but I would like to know if this saw is totally new from the ground up, or if it is an "improvement" on the proven 036/360 chassis. The 2004 Stihl catalog shows while the air filter cover is different, the 361 has brought back the round, spring knob from the 036, not the 90° latch of the 360 (which I have seen get loose). Lower vibration is advertised. Is the 361's carb preheating system like that on an Arctic? The 361 is listed as down in displacement by 2.5 cc, down in weight by .2 lbs, and down in power by .12 hp.