WE used a "standard” A class carbon mast section with the addition of having a section from 300mm above the hound position to 800mm below the hound position having an insert laminate of 300gm/sqm of Kevlar (this is the area where most, if not all breakages occur during an extreme "pitch pole" due - in carbon masts - to the loads on the tension side of the impact, the Kevlar makes the masts almost “bullet” proof). As far as bend characteristics of the mast - I positioned the hounds to achieve the required bend rather than play with a great variety of lay-up variations and cut the sail "to suit the mast" rather than "the mast to suit the sail". To source the carbon mast from an established manufacturer is infinitely more cost effective than going through the process of making your own – believe me I have tried that route. The whole 25’ “bare” mast section weighed in at 8 KG, and it is a better section than the superwing (I should know as the Greg Goodsall “super wing” was made from my original calculations and drawings that I sent to him (at his request) back in the eighties when we looked like we may – at that time – split the cost of the dies to have them made commercially, I still have those original drawings as well as all our correspondence).