G'Day John,
have another good close look at the photos. The rust is outside the screw holes! They have encircled the screw holes with sealant and it has kept the water at bay. The rust is where the water can get under the weldment section and sit. I thought it would have been the other way round. Someone has run a bead of sealant around the mast step, that was what I was going to do. I could only see a very small bit of rust on the edge of the section.
The screws were 1/4" Whit metal thread screws! They've got practically no holding power unless they were tapped in . They did come out very easily.
Interestingly My Sailing is running an article on Rigging and checking it. It seems to correspond with what I have been told to date.
Here is the web site;
http://www.mysailing.com.au/news/listen-to-your-rigger.
In the photos there is another mast that was removed at the same time. It was from a Clansman. It hadn;t been removed in 30 years. There is a crack in the base of the mast section caused by salt build up over the years. As the rigger was coiling the old stays the wires were splitting and cracking. If that's not a warning what is?
Since getting the mast down I've also;
Replaced the steaming light/deck light fitting (50% done)
Found the missing nut to the vang inside the mast, (always thought that was a bit loose)
Found the furler was "birdcaging" (Unwrapping) the forestay and fatigueing it. Needs full backstay tension on it when furling.
Removed the mast head radio aerial, wire was broken at the fitting.
Replaced the Windex.
I'm servicing the ST50 Raymarine wind indicator. (bloody Cockatoos) $55 for a kit, can't get the sensor any more.
All these jobs are much easier done on the dock, even if it is cold and windy.
Greg.