Yes its list hell day…
I have list of curves that are sequential in +ve x direction.
Each x location is a station (every 1m along the model for example). There are 50 stations for a 50m model for example. So the main list has 50 items.
There may be one or n curves at each station
I need to insert, or weave some curves starting at station 15 say, into the list (thus forming a new branch)
If I use INSERT the list is flattened.
If I use Weave new items are weaved starting at station 1 (incorrect)