Correct me if I am wrong, but, if you put a no-nose front on a spoon back will
you not simply end up with a much smaller board.
My suggestion would be to build a wide no-nose (wide for bottom end and to
give you lots of outline curve for turniness) with a moderate nose width,
think of a nose half way between old and new. My guess is this would give you
a turny wave board with a reasonably well behaved low end (not normally
present in a no-nose) that should perform well over a wide range of condition
like your spoon did. I would guess that to build for the same wind range you
might need to make the board a couple of inches longer than your spoon was.
London, Ontario, Canada