I also own a Crossover board, but not the Naish.
It's a custom made from Mojo (Europe based), custom because all serial boards be it Naish, Fanatic, JP, Starboard etc. lack one of the features i wanted in my crossover board -- a deeptuttle box at the rear, for using a freeride/freerace foil on flatwater.
With the boards from the big brands you just have the US-foiltracks mounted more forward, accordingly straps and masttrack, allowing only more sup/surforiented foils with this trimm.
It's fun to ride these setups, especially if it's a little wavy on the water.
But on pure flatwater i prefer riding a freerace foil, foil and straps at the back, trimmed like a classic windsurf/windfoilboard.
This feature was only possible with a custom board.
If you want a foil only board i would look for a more dedicated and more compact foilboard. The boards above have the benefit of also being useable for classic supsurfing or windsuping. And you only have to carry one board for all these disciplines.
Negative is the weight gain by having all the boxes and inserts in one board.
Alex
My boards so far, both 7'11 x 30, 130 liters for my 90 kg