There are pre-drilled holes in there, but they don’t match up. The upgrade kit comes with two pieces of angle iron. My saw is the type that used to have square rails on the front and back: not the round pipe rails. The instructions aren’t great – but did provide a general enough timeline of what to do when. Ended up being a 2-hardware-store-trip project. While the installation wasn’t a piece of cake, it wasn’t too difficult either. T-Square Fence and Rail system from Homedepot online. I was super worried that this would even work out, but I pulled the trigger and bought a new fence for my beat up Delta 34-670 table saw. The $200 fence, $35 riving knife, and $80 wheels, + initial price of saw? I wish I had held out for a better table saw that had more of these things built in, and better dust collection – which is driving me batty.Although, this oddball knife mount is on a steel rod out the back of the table. It does seem to hold the cuts a bit better, and I hear they’re pretty important for anti-kickback issues. I had to locate a couple of nuts and bolts and mess with the alignment, but it’s working now. Riving knife Delta 78-965 from amazon for $35.My saw is a bit different than this one, but the principles are the same. 3/2020 update: Now that I’ve had the saw for a few years, I’ve learned and added a couple things: