RE: where are the F Type
I think that the F-Type line was merged into the iSonic line to present a stronger theme across an overall wind range from super strong to very light. I think the thing that may be a little confusing is that in the merging, the F-Types received design updates that include some of the design and appearance attributes of the smaller (narrower) iSonics. Similarly, the Sonic line was also conceptually merged into the iSonic line.
In my opinion, it was a sound move, because one can select a board that offers the width, volume and length that they need to coincide with the prevaiiing wind and water conditions, with an emphasis on speedy performance with control.