We've used a Lewis chainsaw for a few years. We run a chain around the bulls front shoulder and around it's neck, hook the chainsaw/winch to the chain and run the cable out to stumps and trees and pull the elk. It's easier to guide the elk around stumps and trees with the winch at the elk than pulling the elk to the winch. It works well, but anymore I just 1/4 them up and pack them out, less rigamoral and there's no way to get out of work with an elk on the ground.