The best chainsaw for the job is the one you own! My Husqvarna 445 is a great little saw, but would be considered under powered to be used in a mill! I say to heck with the rules and tried milling some lumber anyways! By using a custom sharpened milling chain, I was able to actually get some reasonable performance out of the little 50cc chainsaw and even managed to build a small storage shed with the wood I milled today!