I got my CS-590 ( 20" bar ) back in spring and have cut a lot of wood. mostly larger logs 12" to 30" maple, ash, oak.. love the saw. it cuts anything I need it to. however a longer bar and chain would make less work if the saw could support one. Echo info has up to 27" it that realistic with the 60cc engine. or would 24" work better. , not sure if it is doable or worth it. thanks for any help.