When my boat heels and returns in moderate air I frequently get a significant clunking noise associated with the keel shifting. I can get it to stop by slightly lifting the keel from full down (the cable then hums annoyingly). I can't get the clunking to stop by slacking the cable or by tightening the keel hold-down pin near the trunk.Has anyone dealt with this before? I am new to the boat, and had the keel cable replaced (as a precaution) right after I bought the boat, so I don't know if it was a pre-existing condition or not.Thanks for any thoughts.Mike.