I take it from this comment
that the fillet logic in GH is different from that of Rhino. This has proven to be problematic for me in some cases, where the fillet by radius component returns curves with smaller than desired radii, even where such a fillet would be possible, and is handled properly by the Rhino "FilletCorners" command. Can anyone shed any light on a way to fillet in GH that comes closer to the behavior of the Rhino command? Right now I am relying on a hack-y script that bakes my curves, runs the command, and scoops them back up... not ideal.