Mwstard said..
FWIW I went through a similar thought process and ended up converting a Hokua. Works fine, but the conversion, though strong added a load of weight to the board. If I breach or catch a rail on this board I'm 9/10 taking a dive.
Having been using a dedicated foil board, the balance/ paddling position is just right, so paddling into the wave in foiling stance is loads easier, the take off is smoother and so I stand a fighting chance of making a 1/2 decent flight. On the dedicated foil board, breaching is recoverable and happens less (maybe because my feet are better positioned.
If I had my time again I wouldn't bother converting a board (unless it could be done really cheaply easily / was the only option).
I am not planning to convert a board, I am considering a convertible board, perhaps even worse because it is also made for windsurfing!
I would prefer to have a dedicated sup to foil but not much is available right now where I live..
And it seems to me that a foilsup for me should't be much bigger than the board I sup on now a Hypernut 7'2x28 105 liter.
Perhaps a little bit bigger for learning ?
What dedicated foilsup are you using?