The 450 rancher is a very capable saw I ran one for 3 years and never gave me much trouble, only had to replace the oiler that was about it. But I think a 20" bar on that saw seems a tad big it will drive it but would perform better on an 18" I also own the Husky 235 and till this day its siting in my garage doing nothing it was the only saw that I hate using, very underpowered for what it is. I strongly believe it was the carb placement in the body that caused a lot of trouble, you cut some wood and half the carb filter was smothered in dust and chippings.