Dimensions for line in perspective viewport in Layout

Hi all,

I had a problem yesterday putting the dimensions(length) for some lines in 3d space in the layout.
Something like in the image below but for about 150 lines.

I tried it with DimCrvLength but since it requieres a plane it wasnt suited, since I would have lasted ages.

I did a workaround with Grasshopper putting TextDots on the Middlepoint of each line, but I wondered if there was a Rhino tool to do that, using a leader like the DimCrvLength does it and without projecting the line to the actual CPlane.

Probably I am missing some Rhino knowledge here, maybe someone could enlighten me.