I got tired of eating the dust from my Delta table saw. It's pretty bad when ripping pieces on edge, and I had to do something. As it turns out, the stock blade guard and riving knife setup provides decent overarm modification possibilities. This was my quick fix, maybe you can help improve or simplify it even more. I'm no youtube pro, or video editing expert, so sorry about the pathetic video product here. Its all about spreading the concept anyway.