I have only two masts 400 and 430 powerex RDM's . What do you think about using 430mast with 35cm extension for the Naish amp 6.5? Or should I get 460 to match this sail. I realize that Naish recomends 460 mast for this sail which is stiffer than 430. On the other end Powerex says you can extend their masts up to 45cm as long as minimum 15cm of the extension is inside the mast. What are
the disadvantages of such a combination. What kind of extension do you recomend.