I heard a while back that the new wing/fuselage would fit on the spotz 3 masts, but not sure if that is still the case.
Spotz really fell out of favor with racers with Spotz 3. Spotz 3 seemed like a decent foil, better built than Spotz 2, but just wasn't any faster than Spotz 2. Hopefully this one will get them back on top, they have been quite a bit cheaper than any other race options.
Seems like a lot of other race foils moved the strut further aft on the fuselage to get more stability, but it doesn't look like that has been done on this Spotz Shark.