1989 Hunter Ledgend 37.5. Have removed both main and jib for cleaning and repairs. During the past few months at the dock in winds of 10kts or less the mast will develop an oscilation that shakes the whole boat quite severly. The boat is new to us and the rigging and spars have not been checked for wear or tunning. We are about to embark on that process and would appreciate any advice or information you can provide. Regards... Bill R