on an easy sail (AWA 70deg, AWS 17kts, STW 7.5kts, 1.2m waves) I noted the main mast lower spreaders on both sides vibrating fore and aft.. Not enough to feel in the cockpit but obvious when looking at them I made a super minor change in the sails and the vibration disappeared. In six years and 12k nm I have not seen this before. Has anyone else observed this rig behavior?
SV Annie SM 37
St Croix USVI