Hi Teri,
Excellent Demo, thank you so much for sharing.

Have you been able to make the selection of 2 measures possible using two dropdown lists, two parameters, and two calculated items ?

It looks like it is possible, but i'm getting odd graph behaviour.

https://communities.sas.com/t5/SAS-Visual-Analytics/Using-measures-in-list-or-dropdown-controls/td-p/207643

Many Thanks

MArk