Richard,

can you modify the software to make it more easy to attach mass to certain node ,furthmore ,can input center of gravity　of the attached mass by input dx,dy,dz from the node.

in this way ,we need not cantilever so many rigid element off of all these support/hanger node,

second,
my example:
a horizontal piping: 10----20-----30-----40,
if i want to add the clamp weight on node 30, i input: 30-301 dy=2mm or -2mm , weight= 500N,and
on node 30, i set a spring hanger,

this example mean i cantilever the rigid elemet off the node 30, rigid elemet 30-301's centerline are viertical but the pipe centerline is horizontal.

best regard,