I got worried re I couldn't remember when I'd last had a survey done - emailed Noble Marine and they now don't require surveys for boats under 26'. It seems they don't include/not worried about the bowsprit.
I have been given a large package of ATYC memorabilia by one of the granddaughter of Nobby Pearce (who founded the ATYC). We had hoped to find the cine films which Nobby used to do film nights at the TMYC and other clubs but no luck so far.
There doesn't seem to be any tube as such, but the black part of the fitting is 1.004" diameter. Mine has the wire proud of the whole fitting and a SS flange, which is not original.
Any chance of a photo of the CB swivel bolt arrangement? Mine was replaced by the local yard in 2022 & I'm still not 100% sure it's correct. I believe originally there was a sleeve which the bolt went through, with flanges so the GRP casing wasn't pulled in.
It might help in ordering things etc to use the correct term - this is a Cornish Crabber Mk1 (or Mk 2 with the GRP deck) not a Cornish Crabber 24. The CC 24 was a different shaped hull. There is a FB group, and a forum which whilst not very active, had lots of information built up over the...