ok bought this booger a few years ago for a rebuild.came with a new or lightly used oem cylinder and an aftermarket piston.i deleted the base gasket.seems that squish was around .020. i put on several new parts,air filter,fuel line etc.saw still wouldnt run so i sat it on the shelf for a couple of years. i pulled it back out last week and cleaned and rebuilt the carb. put on a new stihl 20" 23rs chain last night. the only bad on the saw is that the clutch cover is cracked a little.paints flaked off of the handlebar and 2 of the av bushing plugs are missing. selling to fund porting tools or another project saw. $250 plus shipping