[salibandy]

I suppose it's more for dynamic, as I didn't specify on the incompressible wings thing. Max did say it would work as well for depth, but so far I haven't tried it.

Strangely enough, a hyperfin works best with short consistent strokes often. But there is a good deal more rubber in your fin to conteract for the additional space you asked for. Maybe that has something to do with it.