I thought I'd share a recent experience that may be able to help someone else avoid a mistake. After ripping a bunch of wood with the blade beveled I returned the blade to 90 deg. and ripped several more pieces. Some of the wood was twisted and rough, so I didn't notice right away, but when I started cutting the wood to the final sizes I discovered that the corners weren't cut square. I checked the blade with a square and found it was quite noticeable off. Apparently all my beveling had allowed sawdust to build up on the 90 deg stop surface, and when I returned to 90 deg the build-up set the blade off. It’s an easy fix, but can be a costly and frustrating problem, especially if it builds up slowly. I hope someone else can learn from my mistake.