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Class 40 min displacement is 4580 Kilos. The current 90 deg. righting test numbers are currently 235 Kilos Min. and 323 Kilos Max. https://www.class40.com/modules/kameleon/upload/measurementprocedureforaclass402022.pdf

Piro, the small boards at the shrouds are for spray deflection as seen on quite a few class 40's. The larger " bulwark " style hull sides aft of the shrouds that you are referring to are essentially a raised sheer that does not affect the Righting moment when the boat is at 90 degrees for the...

It looks to me like there was an adjustment in ballast/RM and a chunk of lead was removed from the top front of the bulb.Note the separation, solid lead ain't going to do that .

And Brian Harris is back at Maine Yacht Center watching over the re-fit of the Ex "Bolands Mill" USA 15 Koloa . Seems some progress is happening ! Not having line tunnels we were limited in how much "Canopy" we could build out .

Mine is #15 and dry stored ( mostly inside) the last 5 or so years , was planning on having the keel off this winter as a matter of fact !