My coworker bought a bunch of chains from the same guy for his husky. I doubt the saw will last for 20chains but you can always sell them at $5 a pop if it ever gives up the ghost. I keep 5 chains sharp for my 20" bar and 2 for the 28". That way when a scrounge comes up or I knick one it doesn't cut into the woodcutting time. Just sharpen all of the used ones at once in my bench vise with the viking guide on a rainy day.