If yours is like the one in the current brochure (www.beneteau.com/sites/default/files/public/Produit/PDF/Swift_Trawler_Gamme_2016_en.pdf[/url]) I think you have reached or exceeded the full lifting capacity of the system.
The lifting boom on my boat is more robust than the Beneteau system, yet there is no way I would attempt that lift with it.
Putting on better blocks may help eliminate the noises that have alerted you to the overload, but won't reduce the overload.
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Keith
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