Hi everyone,  Thanks in advance for your patience- novice here! The chronograph function on this 7730 movement starts fine but doesn't stop reliably (If and when the operating lever does engage the stop, the reset works great, however). When I open up the movement case back, I see that operating lever (blue arrow on the annotated stock picture) has a bit of play and moves around, such that if I do engage the operating lever, i.e., begin the chronograph, and then gently push the reset b