You first file the inside rail foot edge away on the stock rails. Both of them. You cut your stock rails, place them, look for the notch place in the jig, knick the feet at the ends of the indicated notching space on the jig, and then go to a bench grinder and gently, with a determined death grip on the rail (!!!) kiss the inside foot to the stone until you have a 1.5" notch, or longer. The notch must leave a vertical flush face all the way down the web. Next, you file the point rail tip using the obvious technique. That much should be error-free and simple. Next, slowly put a bend into the rail until it sits in its appropriate slot in the jig. You must also place a tight V-notch at the thick end of the point rails and bend the guards to the proper angles. Check in the jig. If they sit well without wanting to spring out, you have them right.
By now your jig has all the PCB ties, notched in the middle, in place, stock rails with notches in place with the notches lined up as indicated on the jig. Solder the points rails, solder on your frog and frog rails, and you have a working turnout...provided you remembered to notch all the ties where they have to have notches.