Hello Astrobuf, I also ordered the new slides and went to school on how to install them. As you stated they do not look like they will work but you have to place the stud thru the regulator arm and using a hammer,a flat punch that is larger than the hole in the arm and a piece of hardened steel to set the slide on you will proceed to spread the stud. It will spread and fill the hole and tighten up.You will have to to keep spreading the stud until it is almost flat on the arm. It will help if you have someone help hold the regulator while you hammer away. Good Luck