So I got my freebies from hammerhead the other day. Putting my rear brake pedal on and it comes with the return spring set up that mounts on the master cylinder. There were no instructions included so, has anyone used this return before? Do I keep the oem nut on the shaft or take it off. I have it all hooked up but there is no feeling/play in the pedal. It only moves a tiny bit no matter how I adjust it. Here is a picture.