The thread about losing parts of one's hand is a sad reminder that a table saw has no sympathy for body parts. I've been using these saws for many years and only last year did I install a riving knife on my saw for most of the cuts I make these days. I never used one because yeah--they do get in the way sometimes and they're inconvenient to remove and reinstall. What changed my mind? I had a small stick of wood turn into a spear and do a carrier launch straight into the wall behind me. Luckily I was not in the way when it happened. First time--and hopefully the last time now that I use the riving knife behind the blade. And I thought I was being super safe. I wasn't. Here's a really good recap of how a riving knife can prevent a hand injury. This might be the best table saw safety vid on the innerwebz; it is worth the 30 minutes it takes to roll. Remember the absolute best safety gear is the thing between your ears. Be safe in your shop.