I have an 880 with a 30" new bar and 2 chains. Compression is at 135 but have new rings ready to freshen it up. New west coast dogs and smooth dogs included. Located in mid Missouri .
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I would scope the bore, or take a good look at the cylinder once disassembled. Probably scuff the walls to help with the new rings. Carefully inspect piston and bearings too.
Hone the cylinder, new rings, and crank seals. Or do a pressure/vacuum test bare minimum. Doubt it has a air leak with a piston and cylinder that clean but doesn’t hurt to check.