DS mast

I am helping a friend re-new her old DS1. Hull number 20258. Anybody know how old it is?
Should there be a gasket of some kind in the hole in the deck where the mast passes through? It seems while the boat is at anchor, which it always is, the mast wiggles with the chop and the motion works the forward screw of the mast step. the screw works out of the hole and this makes the mast very unstable. Should the shrouds be tightened? How snug?
mike (mgreen-at-gdsys.net)
Should there be a gasket of some kind in the hole in the deck where the mast passes through? It seems while the boat is at anchor, which it always is, the mast wiggles with the chop and the motion works the forward screw of the mast step. the screw works out of the hole and this makes the mast very unstable. Should the shrouds be tightened? How snug?
mike (mgreen-at-gdsys.net)