Hydro's has a dolphin striker (here: http://4.bp.blogspot.com/-plJNEqIu7...k3vAWmg0/s1600/cclasshydrosADimages1.jpg)

That doesn't mean the other boats do. The DNA does not have a dolphin striker, meaning you can probably do the same on a F16. That is the kicker with the F16 rules as currently written, as has long been discussed elsewhere.

Phantom built a foiling F18, but in carbon of course. Reading between the lines the existing hull shapes are fine but longer and wider is much better, as is having a second pair of hands to work the dagger boards. Time will tell.