Rhino modeling help

How to create a “tube” that encloses 3 spheres kept at the vertices of a triangle.
Ref file attached,

Need help in creating a tube line structure that holds 3 spheres at the vertices of a triangle
1.3dm (766.1 KB)

how do you want the inner connection to look like ?
sharp or with additional fillet ?

have a look at the follow commands / workflow:

_explode the inner triangle
_pipe to get the cylinders
_trim the intersections

_revolve the remaining rectangular edge of the cylinder to get a partial sphere
_filletEdge for the remaining, sharp inner seam

not sure if this is the fastest.

better designed alternative might look like this (no pointy fillet)