This is definetely a BP part that also was used in a tutorial to attach the player into a spline.
As I’ve said, you could try the collisions one, and even Coqui Games one seems to be good, what happens is that is not “modular”, unless you character move at the same speed rate in splines, no matter what if is in curves or forward lines, then I think you could try to set up a fixed speed that looks close to the normal one.