Re Vibrations in rigging on Legend 35.5
Thanks for this tip and for all the others I got. I tried adjusting the backstay and shrouds and it actually worked. The vibration, which was very heavy, has now stopped and all seems well. I tightened all the shrouds about 1/8 th of an inch and snugged up on the backstay.
The rig on my 35.5 is by Isomat and they have stopped production but I did find a source at Charlaston Spars. I am relieved that I do not need a new mast as the vibration was so bad it would have shattered the mast eventually.
This is the second time I have had a similar problem. About 15 years ago I had heavy vibration in the boom which led to a total boom failure. That was caused by the triangulation of the mast, boom and topping lift. Since fitting the new boom I also fitted a solid vang and have had no problem since.