This is a customers saw, he complained that it has no power and has ran I saw I ported. He wants me to increase the power. I sharpened the chain and increased the cut speed 300%. I tried to tell him that he just needs to learn to sharpen the chain properly but he still wants it "tuned up". OK, I told him I'll take a look at it. I've not been inside a 450 before so I'm learning something here and thought I'd share it with you guys. The saw is just over a year old. Nice, light 50cc machine. Here's a shot of the chain as delivered. Note the dust. No chips in this baby. I wanted to see how it was cutting for him... [video=youtube;uwZOj6Y4SrQ]http://www.youtube.com/watch?v=uwZOj6Y4SrQ[/video] This is after I sharpened the chain... [video=youtube;jqAXpWewmBY]http://www.youtube.com/watch?v=jqAXpWewmBY[/video] I debated just having come to pick up the saw after seeing how bad his sharpening skills were. I really can't see the point of an increase in power in a saw that will be treated this badly. Believe it or not this fellow cuts quite a bit of wood. He has several acres of wooded property and is a damn hard working man. I think I'll take the time to show him how to use a file. I also plan to give him a few extra loops I have laying around. If nothing else maybe I'll end up keeping his chains sharp for him.