OutdoorKing Repair Forum Forums Restoring, Customising and Modifying Tech Talk Replace PISTON on my Shindaiwa trimmer?

Bad news. Took my Shindaiwa T230x apart and found this:
Exhaust Side of Piston

Intake Side of Piston

Exhaust Side of Cylinder

Exhaust Side of Piston

Piston was scored throughout. The cylinder was extremely smooth except for a single small spot where you could feel a little bit scratched if you touched with the fingernail.

QUESTIONS: Do I need to replace piston rings AND piston AND cylinder? Or can I just get away with buying piston rings? The trimmer works!! It just has trouble idling so you have to keep pulling the throttle to keep the engine running. Will it cause more damage in the long term if I don't replace the entire piston? I'd like to know your opinions...