widowmaker1, i have used the 3120,since 1990 and it is still going. The saw cuts very good,but here comes the but, i had somethings changed or updated. I changed the coil to 268, an advanced the timing,the saw turns 16,000 with a gutted muffler. I put a regular semi gutted muffler,turns 14,500. The saw was loud, i mean loud. I use the saw for big stuff. Never a moments problem yet. Now watch it tear up. I am looking about a stihl 880. I use the saw to cut the wood still on the log. When it is really big i make 3 or 4 cut vertical cuts and 3or 4 cuts horizontal,then cut it off the log,i hope this makes sense.this makes it easier to pickup and split.i use stihl rapid super chain on huskey saws hold edge more chromium i was told, i use maxima k-2 oil an i am checking into manhattan oil,heard praises for this oil,super 2 cycle oil i hope i have help or maybe not confused thanks johnfawn2000