I have a question about lever cap screws and their proper tightness. I have a Lie Neilson no.4 and I cant get the blade to adjust properly. It moves a little, and I mean a little but the adjuster knob locks up tight. How tight should the lever cap screw be? After I sharpened the blade I put everything back together and maybe I tightened the screw down to tight. I need a good source of information on how to properly set up the plane after taking it apart.