(Higgsas) Geometry Nodes Groups Blender 3.3/4.2

Hi! I’m exploring your Curve Deform nodegroup, and it works great on one mesh and one spline. But in my example i’m trying to deform instanced cubes along multiple splines (also deformed). It’s easy to translate instances along curves with just rotation alignment - you can see in my video example. But it’s not working when i’m trying to send instanced splines and cubes (realized) to your nodegroup, only able to choose one spline with index. Reference pic is attached. Thanks!