Nicely done! I’ve played around with some Rogue style green drakes. I tried to get a better taper by cutting the foam into an hourglass shape. But the narrow point was too small and would often tear when putting it on the needle.

Have you looked at the Furimsky style drakes? I think Charlie Craven has a tutorial. I tied some like that but used thinner foam and cut it into a taper. They turned out fairly good , but I need to find the right color of foam.