Okay, I understand now.  :lol:  I'm slow.  Thank you both for explaining!  :thumbupboth:

I think building a straight chain is the right thing, particularly if a .cr2 is going to be generated.  And building it along Z does seem to make the most sense.  Working with parabolas is beyond what I was even contemplating.  :lol:

Quote - The minimum set is :-

1. Curved section radius
2. Straight section length
3. Radius of the link

Looking at the image Les posted, I'd assumed I could work out the proper spacing and origin/endpoint placement using only the length of each link and the "Thickness" value.  Calculating the proper offsets from that seems possible.  Am I under-thinking things again?  :lol:

I'll check out all of the examples.  Thank you!

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Cage can be an opinionated jerk who posts without thinking.  He apologizes for this.  He's honestly not trying to be a turkeyhead.

Cage had some freebies, compatible with Poser 11 and below.  His Python scripts were saved at archive.org, along with the rest of the Morphography site, where they were hosted.