An untested fin. It has the same foil as Alto in the base but tapers evenly to a very flat foil at the tip. It was a test to see if the plastic was flexible enough to give the twist I wanted at the tip. It was not, hence the cut in the foil you see in the photos which I made with a saw to try to assess how to tackle the design.
It should be a fairly good fin though. I’ve not tested it yet as I destroyed it trying to find the right twist with the saw. It’s not exactly what I had in mind and at 14 hours print time per fin, I’ll get back to it later.