You can probably see that Graham and Chris new boat has, like the last one, got an underdeck furler fitted. I’d swear the last one we saw used a wire strop to the tack, but this new one seems to use a tube to connect to the genoa. It would be interesting to see if it emerges through the deck with some kind of bearing. That’s what we had on my Dragon and on the last Flying Dutchman I raced.
The Flying Fifteen Blog 
If I remember from the measuring the stainless fitting (custom made by Chris) exits through an angled hole, that appeared to be lined with some carbon, very nice neat job (as you’d expect from Chris.