jammin_with_j
ArboristSite Operative
I didn't take any pics of the piston, but I will when I get home today. I'm not sure if I should put it back in since I can't get rings for it, but it does look fine, the rings on it seem loose, the piston slides right into the jug with very little resistance.
You should still be able to get rings for it. contact "watsonr", he's a site sponsor and deals with caber rings, should be able to fix you up, or contact a local dealer. Its most likely a size used in other saws as well