Retrodirect - Member
The standard homebuilt-carbon practise is to use closed-cell foam or even polystyrene for your mold which is cheap and can be melted out with acetone after use. why on earth did he use wood?
a friend of mine has made a couple of diy-carbon frames, he experimented with foam, and acetone, and some scales...
he found that 'melting' the foam out of the tube increased the overall weight by a few grams (lots of gunk gets left inside - especially in complicated shapes like a bike frame)
and the foam he uses only adds about 20grams per tube, so he leaves it in.
i assume that the weight of the balsa wood core isn't enough for our swedish friend to worry about.