Trying to decide what to do with my CS-400 that blew and Echo wouldn't cover (shock). Keep it for a parts saw for my other 400's or rebuild. Where would be a good place to get piston, ring and ??? Haven't checked the jug yet but any recommendations would be helpful. Before I retired as a machinist we would hone out cylinders and install oversized rings. You do that on a chainsaw? Never did a chainsaw. You experts, CliffR, I'm willing to listen. Thanks.