Extrude Mesh along Spline (with Scale)

Hey Guys,

so I already created a blueprint in which I can extrude certain meshes along a custom spline using this Node-Setup:

Problem is: I can not change the scale of the mesh along the different spline points.
Does anyone have an idea how to solve this?

(Additionally it would be good to also change the roll on each spline-point)

this guy has a track system that uses splines and can be scaled ! download and see bp code !(Look for functions inside tick that animate tracks !)