I need to remove the stem shaft from my OEM clamp and install it into the new set. Any advise before I do this? I'm guessing its a straight forward deal but maybe someone here has some insight on job. I'm guessing the shaft presses downwards towards the wheel. When I install it into the new clamp will it seat up against something or just press it until its tight I'm hoping its not stuck on there good because I don't want to break anything.