I don't have the mail anymore and my english is not very good.
A serie of kit have been released in the middle of last year with a main aluminium joining wire (the big one giving the diedral, not the pin) made in to soft aluminium. they asked the owner to make a simple test.
take your joining wire, bend it with your hands (sligthly), if it return in his original state, OK, if it remain bended, WRONG.