Zigzag

@gmacpro @Jom I see the intended way now, but here's a vid of how I solved it initially.

Spoiler: Movie

@Don G Rowe I love the way you got the ball to pop up with B riding on it,. I might have to put that in a level sometime. It's fun.

Great! I see 2 options with the last ball. If I use the ball, the slider below doesn't need, if I use that slider, the ball doesn't need.