I bent up the second knuckle rail for the Comstock Road diamond and set about filing the two other running rails. I very carefully blued (with a big Sharpie marker), marked the angles using a scribe like a proper machinist, and filed up to the line. The first rail works beautifully. The second one had a slight issue. (If you look closely, you can see that the second rail has the angle going precisely the wrong way.) Fortunately I have lots of rail and the filing process is not too time consuming.
I am also glad that I took the time to make up my set of roller gauges. They made setting the rails for the second half (side?) of the diamond a snap.
I also got the frog and the straight closure rail for the turnout leading to one leg of the crossing down. I plan to do the same for the other turnout before putting down the crossing since they are less mutable than the diamond itself.