A while ago I posted about my friend borrowing my saw and killing it. Well,upon further review, it does look like it had straight gas in it - the piston is all scratched up. I was looking online at a new piston for it (Husky 142), and was wondering if I could just replace the piston, or do I need to replace the cylinder,also. I'm pretty sure I should do both, but I'm just wondering what you guys think. Any suggestions??