I have a Tucker Vice that I purchased new in the late 90s. The vice has been great up until recently. Everything works fine until I get to the last couple terms of tightening. As the vice gets tighter on the workpiece the quick release button depresses, disengaging the screw and stopping any further tightening. I replaced the return spring and lubricated with WD-40 dry lube. Everything works fine until I attempt to tighten the vice. Does anyone have any suggestions? Thanks