I hate to send you guys back a few years in time but this saw is one of my favorite mid-size Echo chainsaws:
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CS-4500. You can adjust the idle without a screwdriver and boost the oil flow as needed with a button press. No chain brake, but I cannot remember when I ever needed to use one on any saw that I own. When I rebuilt this saw, about the only thing it needed was a couple of caps (fuel and oil). The original owner said, "If you can fix it, it's yours to keep. My chainsaw days are over." So, I restored it.