Quote - Let me think about this.  I hadn't really given any more thought to chains than to knots.  There may be some way to automate the creation of a chain even more fully than you're suggesting, at least the geometry portion.

It would be great if you could come up with a chain making script, even if it could only do parts of the process. I did once makes a chain figure, but it was a lot of tedious work. You make a good point about using geomCustom to avoid the need for group names.

Whilst any help in the process of making a chain would be appreciated, the geometry is only part of the problem. The cr2 is arguably an even greater part.

For the most part each actor in definition section of a chain cr2 would have identical contents. The exceptions being the name of the actor, and the 'origin' and 'endPoint' lines. It is calculating and typing out the origin/endPoint lines that puts me off the idea of making chains. Any help on that score would be much appreciated. Even a script that just took the origin and endpoints of link 01, and the desired spacing as input, and that would output a list of origin/endpoint lines for the whole chain,  that could then be pasted into a cr2, would be a help.