I think I will stay with pellets, one odd size chip could bring the auger to a stop, which might cause additional problems or damage to another component. I am about to replace my fan, the bushings have evidently worn and it needs a little spray of WD40 each time I fire it up. When I replace the fan I planned on dissembling everything and doing a good cleaning. My thoughts were to remove the auger and check the wear and condition of the auger and the feed tube it runs in. If the interior of the tube looks a little rough I thought about running a brake cylinder hone through it just enough to smooth / clean the inside of the tube. I can wire brush the auger when its out and remove any burrs. Just wondering if anyone had done this before. It will be a little while before I do this due to a back problem I am working with, but I will post my results.