Rotating a character along a spline

Sure, thank you. This is what I’m working with.

Basically, this will make the character face perpendicular to the grind rail. Return Value 1 is the movement vector and Return Value 2 is the perpendicular angle. It works fine without the Rinterp, but doens’t look very good as it snaps instantly. Rinterp will cause the character to spin in circles on the rail if the interp speed is low, and kind of just sit at an angle if the speed is high.