I think 110Kgs is very good for a "bulletproof" surfboat! smile You are not that far off from F16 min weight.

Not on topic but just to satisfy my own curiosity. If you find your strength decreasing as you get older, what do you do to improve your strength? It is never too late to work out, if you dont already do. I have seen 80 year old chaps do handstands..

ref: http://www.youtube.com/watch?v=lDlMyJooTok&feature=player_embedded
http://www.youtube.com/watch?v=kK2XU4wPQws&feature=related

If I can do stuff like that at age 70, I'll be happy. This guy still seems strong enough to do some serious sailing. As long as he keeps at it, I bet he can do the same at 80. Age is a mental thing I think..

It would be very interesting to learn some more on just how you did the composite beams. Someday in the future I might want to do a wood/carbon beam in strip plank. How about the mast step?