Hydestone, are you talking about the small log mill that only clamps to the power head end of the bar? If so, I don't think everyone understood that. I think for going beyond the 20 inch bar suggested limit you will want and need the rest of the parts. How much longer of a bar do you want to use, how big of a saw? I think you might as well look for a whole nother mill complete. You might find one on craigslist or some other source at a considerable savings. And you might consider building your own, as they say, it ain't rocket surgery. I have done all of the above. You end up with a lot more options. And definitely add an auxiliary oiler.