3 axis on a pivot chart ?

I have found a number of tutorials which show the method for creating a 3 axis graph.

https://www.youtube.com/watch?v=CpR8QvC6pAA


I've tried this and it works, but for some reason when I try to do this method using a pivot chart instead of the regular chart, excel won't let me erase 2 of the 3 axis on the duplicate pivot chart. I'll try and erase one and it just redraws it back in a different color. Maybe pivot table axis can't be deleted in the same way as a normal chart ?

Is there a way to overlap a third axis ( 2nd y axis ) onto a pivot table ?

Cheers
Corey