Now that we've cut our apron pieces, we want to figure out our wood diagonal piece that will lock in leg and I'll show you. Normally what I'd do is, again I'll set everything up along my line. We want to take our table leg, put it in place where that's going to go very gently. What we need to do (see if I can turn this around and get a better shot) is I want a diagonal piece of wood that's going to fit right in here, slip down in and that's when we'll accept our lag screw. Now normally what I want is I want this piece to be just an 1/8 of an inch outside of here. It's not important exactly that it has to be an 1/8 of an inch but I just eye ball about an 1/8 and then what I'll do is make a mark here and here. That'll give me this dimension here from here to here, it will give me my dimension of how I'm going to cut this piece to fit inside there. Now this cut is going to be a 45 degree miter cut, so it's a little difficult because want it to be at a 45 degree angle cause that'll hold this at a nice right angle. Once we have this and again like I said that 1/8 inch is pretty arbitrary you don't have to sweat it, you just break it down into baby steps. How far does it need to be? You create your line and since I'm pretty tightly on my line I know that pretty much from here to here is a good dimension to go from. So I just lay my tape measure in there and it looks like it's 5 1/4 inches. So, what I'm going to do is I'm going to with more of the apron material I'm going to cut a 45 degree angle here, here so that the outside dimensions are going to be 5 1/4 inches. We'll do that right now.