@Balwyn Thank you SO much, this is just great. It's ready to use as-is but I'll study it and try to understand how it works, and see if it can be adapted to do have more segments. It's a very instructive patch for dealing with these node constraints, and I love the vanillaness about it

Thanks again for sharing it.

Here is another kind of array object (no structs this time) with free point plotting and curve transitions. There are two layers in the GOP box: the layer with the canvas points and one below with an array-table and a resized slider in front to block mouse interaction.

array2.zip