The highest cast stud boss is located by using a straight edge across the top of all of the stud bosses. Then a tool which is set to account for the thickness of the base of the "screw in" stud (the nut part) and the spring seats is used to cut down the casting. The tool automaticly stops cutting at the preset depth. Once the first one is cut the drill press is set so that it will not allow the other bosses to be cut lower even though their original "top" is not as high as the first one is. Follow? This way the guide plates will all be level and the studs will be level. This is much more acurate than the factory setup. Below is the cutting tool used to cut the stud posses down.
After the bosses have been cut the remaining part used to "guide" the cutting tool must also be removed so a different cutting tool is used to remove the remaining metal till it's flush. There is no preset stops involved in this procedure. It's up to the machine operator to make it perfect. Which of course I did as shown in the photo below. LOL
