North Wind 47 rigging

Hi!

I have a North Wind 47 yacht and I’m having challenges on rigging the mast. The shrouds look significantly loose already in about 5 m/s upwind.

I have put more tension but they are already in 25 % breaking point. I found out that the diameter of the shrouds not as high as it has been originally, but I don’t have the manual to check for the correct diameter.

Maybe someone here has the manual or has similar boat and could check the diameter?

Best Regards,
Lahna