Today I am mostly asking about goosenecks

BobnLesley

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I Had great result today: Glanced into a Chandlery's Bargain-Bin and spotted a gooseneck fitting that was exactly the same size as ours, discounting the excessive wear & slop that ours has acquired over the years - it's very 'tired' - for the bargain price of US$20. I bought it, went back to the boat to see about fitting it and noticed that there's a little more wear wear in the mast-bracket that it fits into than I'd thought; it's nowhere near as badly worn as the gooseneck itself and I could fairly easily grind/file if square/free of rough-edges and still retain adequate strength in it, then shim-up the play to suit the new gooseneck.

However, my $20 also bought me a brand new new mast-bracket too, though that unfortunately, doesn't precisely match our mast's profile: With the centre flush against the sail-track groove (so the two bolts and track-slugs would fit perfectly, the two edges where the lines of three rivets would go, stands perhaps 3 or 4mm away from the face of the mast. I don't fancy the idea of just cranking-up the rivets and perhaps deforming the mast, but is it feasible to shim-up that gap with small washers? or better still is there perhaps some semi-compressible plastic sheet I could put between the mast and bracket to marry-up the two?
 
Some time ago when I had a new gooseneck fitted a similar size gap was resolved by bedding the fitting on a polyester filler and the rivets being squeezed up reasonably tight. Once set this leaves the fitting on a solid formed base. Never had a problem and also the filler acted as a good barrier between the aluminium mast and stainless steel fitting.

Yoda
 
Would do the same, but perhaps use thickened epoxy rather than polyester technique is described in the WEST manual for mounting deck fittings where the deck is not flat.
 
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