Ah, I think I’m getting a better picture of this.
I run this event in the Construction Script:
Do note how the components are now added to a Static Mesh Component array so we can keep track of them. This allows me to preview the result in the world and manipulate the spline any way I need:
The arrows are not aware they’re attached to a spline, they will not follow it. The Construction Scripts actually executes every frame and recreates everything from scratch, creating the illusion that objects are attached!
Instead, we animate a spline point and ask the array to update the position of its elements:
Hope this helps.