What a painful process to fumble through rigid curvilinear CAD tools to chase after an organic-looking shape. If only Rhino 7.0 offered a Sub-Division toolset as T-Splines once did…
We could then start by extruding & pivot-rotating a flattened shank…
…then begin gumball rotating the successive ends until reaching the apex
(Disclosure, Gumball’s auto-reorienting sucks. Users currently have to brain-boost into clever-monkey mode to compensate so that extrusions properly orbit the exact center. Leave my gumball where I last set it! While we’re at it, do we need to grovel for Gumball extrusion dots for the rotation handles? The Move handles have them. Extruding while rotating was a main T-Splines workflow staple.)
At this shank-half’s completion, world-center the gumball, Alt-rotate a copy to face 180º of the original…
Stitch the mating top vertices. Stitch the mating bottom vertices…
and the tab-toggle gives us a proof-of-concept.
But the peanut gallery is screaming that it’s not the same style… and that’s mainly because the twist in question has an apex cross-section located laterally to the finger. Study the travel direction, adjust accordingly, deploy the “Insert SubD Edge Loop” and “Slide SubD Edges” tools judiciously…
THIS is where a properly working Z-axis Radial Symmetry would’ve been sweet, but I’ve already used up all my genie wishes on unicorns & cupcakes, so we’ll repeat step 3’s copy/rotate.
And stitch vertices…
…to end up here.
