just came back from Nacra Europe, talked to the guys in the shop:
The 20 ft which is on the picture is used as a test platform for a /the new boat

it is almost 3mtr wide/ they said that the new boat will be even wider!!

the dagger foils are not the M20's but close and they are experimenting with these foils
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I saw a couple of masts which they are testing with- huge