Right on Pete. I run a 359 because it's lighter than my 670 Champ and she IS my Beee-atch. I generally run Oregon bars, but I figured out a while ago it doesn't matter what bar you run, it's going to wear. the reason you're drifting one way or the other is because one side of the bar has worn and the other side is higher. Every time I sharpen my chain I flip the bar. I also broke down an bought a bar dresser to take down the high side. Works like a charm. Costs around $20. Well worth the investment.