Animating an object along a custom curve. The custom curve in a flexible box does not size properly.

[ShivSHEN]

I am creating a responsive project in which I have to animate an object along a custom curve along a custom curve. I have not been able to size the custom curve  properly for various screeen layouts. Please help.

[Nancy OShea]

[Moderator moved from Using the Community (forums) to Animate.]