No mate. But I have thought of a few variations. Just wondering if you would get the same variation with stiff rubber fins. I just took a couple of thinner plastic surfboard fins off my 7ft Hyper SUP after hearing fin whistle when tearing down my first wave! Lol! Wonder if these would do the same?
Actually I have been thinking of pivot fins. Similar to shopping trolley wheels, Lol!! Not invented yet as far as I know. Ones that don't fold but pivot on a longitudinal axis as a higher side pressure is made on a turn which would then add to a quicker, tighter turn on demand. This would be great on a front & backside turn on the lip, & tail slides. But when doing a rail turn the fins would not pivot much. The pivot fin would have less drag & a snappier turn without the tail lifting out I think. If only I had the time to create my concepts.
But hey, the slide fins would have their place for a different variation again.