First, I really appreciate any help, and the professionals willing to reach out. I can answer questions in other forums but not here! I have a barely used DEK Brushmaster 15 hp chipper - single blade on a rotating disk, leaf chute on top. Total run time is less than 20 hours. It's been in storage inside for a year, and I tried using it this past weekend, and it won't chip without using considerable force to push the wood against the blade. I don't remember it working like that last year. I sharpened the blade (although it seemed pretty sharp), minding the angle, and it was sharp enough to cut paper after I was done. I'm pretty confident that the angle of the blade now is incredibly close to how it came out of the machine, and it did not look worn down when I took it out. It still won't chip properly after sharpening. No debris wrapped around the shaft, and if there's an adjustment on the machine for angle or depth, it's not obvious to me. The distance between the blade and the reinforced sidewall is just shy of 1/4". I tried chipping two small, dead and dry branches and it left burn marks on the blade, which I didn't see before. I'm not sure what to do here and looking for suggestions. Set it on fire at the end of the driveway? Use it as a planter? Thanks to anyone who can weigh in!