The previous owner showed me how to raise the mast, but he said that he left the pin in at the base since he had heard of the mast jumping out of the base. It does look like there is not much engagement between the rod that is bolted inside the mast and the mast step base that is mounted to the cabin top. There is a 1/8" (3 mm) stainless rod welded across the mast step about 1/4" (6 mm) up from the bottom and that seems to be the only thing locating the pivoting mast.
Can anyone shed any light? Does it work in practice or am I missing a piece?
Sorry for no photo- if needed I'll get one ASAP, but maybe someone knows exactly what I'm talking about

TIA and looking forward to being a member of the DF community