My master cylinder for the front brake on my SuperGlide is leaking a little bit. I tightened the two screws real tight and now it's worse. I ordered a new cover (paint all peeled off the old one) and new gasket, my question is "how tight do you tighten the screws to get a good seal?" I can't see anyway to torque it to a spec with a screwdriver, so how tight? Hand tight? Really tight? lightly tight? Thanks!