A single surface 4 blade propeller

Oh my, another head melting mathematical surface development by Daniel Piker
https://t.co/CmMYydGVLP?amp=1
http://3dviewer.net/#https://raw.githubusercontent.com/Dan-Piker/Dan-Piker.github.io/master/seiferthopfsurface.obj
This tweet vid isn’t working for me…but… https://twitter.com/KangarooPhysics/status/1164514656150593536?s=20

For those of you who knew straight away…
yes it’s Möbius transformations of a minimal Seifert surface on 4 Hopf fibers