got a craftsman chainsaw, 42cc 18" bar. cuts pretty good. was blastin thru some good size cherry. but as time went on, nut cuttin so great. takes a while to burn thru even in some pine and poplar, more the ash and cherry, even birch. sharpening the chain constantly, but its only good for about 15 mins, then it bogs down and smokes her up again. I look at new chains for that saw, but they all look pretty much like the one i got; the cheapest one availiable that they put on them in mexico or wherever they make the thing. Can I get (or is there avail?) a more aggressive chain for this saw? I wanna see chips flying off this thing, not saw dust, when i cut. And for the record, i have the chain on right, this is not my first rodeo w/ a chainsaw... but i have had crappier ones that worked a lot better.