sounds interesting..

I now believe Nicole's mast was western red cedar backbone and balsa aero-front.. Finally found some old pictures of her 76 world championship winning boat..
The bolt rope was routed if I recall into the flat back of the cedar.. But to be honest that could be incorrect and the picture doesn't suggest..

I spoke recently to the last Aussie C wing designer and he suggested he would do a ply wing mast if there is ever a next time.. So maybe your onto the next big trend.. *smiles*

I also can't recall where I last saw the ultrathin aero-grade ply.. Think it was at the local hobby shop.. Used for model gliders and planes..But the issue will be scarfing 1 mm thick ply!! <img src="http://www.catsailor.com/forums/images/graemlins/grin.gif" alt="" />