Stand Mixer Speed Control Is Not Changing Speed To Desired RPM

I have a 2007 K45SSWH. It was only running at high speeds from Stir on up. So after reading message boards and watching some videos I decided to replace the speed plate, brushes, and the speed governor just to be sure.

Now that I’ve done all that. If I tighten the top two screws all the way down to when it stops and back them out, it goes from being off to about 75-80 RPM instead of 60rpm like everyone suggests.

I tried them at 3/8” like a lot of guides say and it goes even faster.

I am unsure what to try now?