Oh bless your soul Harold. Was just finishing dinner and 3rd desert (wut? I'm a growing boy) and was gonna head out to the garage looking for an old motor and a magnet. A google search actually found plastic piston rings. Thought maybe they were using them.
Al, and I was so happy when your piston got sorted out, lol.
No worries though. It will all work out and you'll be zipping around grinning from ear to ear soon!