First of all thanks very much for the really kind comments.
The piston wasn’t modeled on any particular make or model.
My son and I have just completely rebuilt a Honda B18C4 engine.
I just thought afterwards I would try a picture loosely relating to it.
I know what you mean about the mesh / wavy piston ring.
That particular ring we put in the engine was like the one in the picture.
It’s like “/\-/\-/\-/\-/\-/\-/\-/\-/\-/\-/\” but obviously circular,
with a metal wire going through the center. I got the metal ring as you can see
going across the gap but couldn’t get it right when making the object
so just settled for a mesh material from Bryce.
I may still try again.
Thanks for your input.
Click thumbnail to see full-size image