I was poking around Sears last night and stumbled upon a 46cc/20" craftsman floor model (never used-no case) for $160. I told the sales associate that I'd take it right now for $130 and they went for it. I know there generally regarded as junk at AS but I've heard the spectrum of stories from did'nt work out of the box to people cutting cords and cords of wood with no trouble. A couple things that attracted me to the saw: It has a small real bumper spike, normal chain adjustment (not intenz) and a .325 chain and H/L screws. Anyways, I ran two tanks thru it today and (almost to my surprise) no problems - started cold, started hot, idled normal, smooth power. I am sure these things are set lean, should I let well enough alone or try to open muffler (catalyc-I think) and readjust mixture? The screws are pointed at the top with a micro spline on them. Is there a tool to adjust this type of screw? There does'nt seem to be limiters on the screws - just anti fiddle design.