Can anyone advise as to where I can obtain a Tuttle fin ferrule. The local shop doesn't keep them.
thanks in advance Nick
Are you referring to cross nuts - those brass cylinders that the screws thread into?
Google "brass cross dowel nuts".
I bought some from this dudehttp://www.ebay.com.au/itm/Messing-insert-12-6-mm-windsurfing-fin-/170983667352?pt=UK_Sporting_Goods_Windsurfing_CV&hash=item27cf6bb698
Took about 2 weeks to arrive. You have to buy a few to make the postage worth while, I also added some fin bolts with washers on my delivery.
usually called a "barrel nut" and I've never found them hard to find
If not at windsurf shops, a specialist fixings retailer will have them (but don't be tempted to go for the zinc plated steel rubbish at hardware stores)