Help to create this surface connection on the Airpods Max

[lander (CAD CAM CNC)]

I been tryna find a thread on blending 3 circles though, and can’t find it.

I know it’s somewhere…

This is kinda close:

How to blend 2 pipes like this?

I am trying to blend these 2 pipes, I search on Internet but usually are blending 3 pipes, but I need to blend 1 straight and a arc pipe[blend 2 pipes. Any idea? blend 2 pipes.3dm (167.7 KB) [viewport]

another similar thing but not the one I’m looking for:

Geometry not possible to create with Rhino but works with SLDWX

I split the unioned arc segment pipes and the straight pipes with a surface in the XZ-plane. Exploded everything and split the curved surface segments with isocurves, then joinedd everything and capped it. [image] Another approach to model this T-pipe is by extruding a rectangle with concave corners. The fillets need to be done one by one. Done in one go, Rhino seems to dislike some coincidences. [image] BooleanUnionTest.3dm (1.2 MB)