I bought a used model 36-816 Unisaw last year and I really like the saw. The saw had been sitting unused for several years when I purchased it. I noticed some excessive vibration when I got the saw home but I assumed it was due to a "memory" problem with the belts having set for so long in one position. The vibration got better with use and is not a major issue. Tonight, I decided it might be time to check the belt tension and was surprised to find that the tension on the three belts varied a great deal. I am wondering if it might be time to change the belts as there doesn't appear to be any individual belt adjustment. If so, is it recommended to buy Delta belts that are recommended for the saw or to go with the "chain link" style belts that some people feel are superior. Any help is appreciated.