Dear Geoff
Thank you for answering my question.
At the top of the mast, there is a small aluminum plate covering the mast top, it is attached with 6 rivets down in the mast. That plate is almost broken where the stern tack is attached to it. It is probaly not original, and i have not seen how the stern tack is attached normally.
Please forgive my english, i´m not sure i know the right maritime expressions, hopefully the meaning should be clear.
all the best
Jesper