RE: Low Compression ???
If he can do it himself the whole top end, including piston, ring, cylinder, wrist pin and brg., and gaskets would costhim about $125 including shipping. If I do it, you can add$40 plus about another$30 in shipping.
My concern with thelong term running of suchlittle oil is thebig end of the rod, if it needs a new crank also, forget it and buy a new DLE55. If theCylinderand piston can be reused it might be worthputting a new crank in it but it would probably be marginal.