Thanks that is useful. I think I am in the ball park. Have just used the last of my carbon and created the collar as suggested, it finished at about 5 mm plus the biax. Will get onto the filling and fairing and hopefully start painting in a week or 2.

Thanks again for your helpful advice over the last few months.

Great information Rudolph, thanks, I will do that. Do you think the construction as described is adequate, not enough or a bit over the top?

Thanks, I will do that. I have some of the 162mm wide uni carbon left. Would I achieve this by wrapping round and round at deck level? And then biax?

The outside of the whole mast has about 6 mm of carbon plus another layer at the deck tapering out. What are your thoughts on its strength?

Hi Rudolph, the mast is 14.6 m long (48"),115mm at the truck, 275mm at the deck and 235 at the step.

To be more accurate about the wall construction it is about 20 mm thick Douglas fir with internal epoxy fillets and glass tape. At the deck area there is also 660g carbon and 660 g biax glass inside. Outside it is a layer of 660g biax glass then 3 mm of 330g uni directional carbon, another 660 biax glass then 3mm of 330g uni carbon and finished with 450g biax. I used 80 kg of epoxy and a rough guess of its weight is about 250kg (but will weigh when I put it in). I will weigh the old mast and standing rigging when I crane out but think they are heavier. Yes it is lovely and stiff though not the best finish as I left most of the glass and carbon overlaps so when you sight along it there are many small bumps but the mast is straight to the eye.

Cheers, Jim