Well said sedanman. I have 2 of the 520i saws and have only used one of them but if I buy a 540 I can start mixing and matching and going for the gusto. The one that I have used is great. I run full chisel on a 16 inch bar. I bought these saws for limbing and they dont weigh much. I cut osage orange which is extremely hard wood and found with the 16 inch bar and the full chisel chain that the 520i has enough grunt to go into a big log. Elmore you did not go wrong getting that saw. I think list was close to $500.00 for the 520. It will last you a long time. Buy another one like I did and it will last you a long long time.