First photo shows many years of significant damage at the mast's foot hole.
Second photo shows a custom repair kit designed (without guarantees) and made specifically for my problem, in 1993, by a Frank Butler of Catalina Yachts.
Third photo: Today, I attached the kit to my mast...better late than never.
Forth photo: I don't know if Mr. Butler still works for Catalina, but I will try to thank him again for his excellent engineering...it fits like a glove! I hope it works.
You may notice that I drilled additional holes to reattach the foot base. Now I must figure out how to secure it.
Fat screw heads may be too wide to fit into the "tabernacie" when stepping the mast. It was previously riveted. Any ideas will be welcome.