My saw has started making a bad vibration. It is about a year old and has not been used that much. I checked the blade, it appears ok. The back of the blade alignment was a little out and I corrected that, but it still is not right. If I put may square on the front of the blade and rotate it, the first half of the teeth will touch and the other half will be 1/16th out. If I move my square to the back the same thing happens. Is something wrong with my adjustments or what? I have also tried another blade or two with no change. Can anyone help?