How to set Physics Asset Tool properties in blueprint?

The title says it all. (Sorry if this is a noob question.)

I made a blueprint that scales the player character to different sizes, and it works like a charm, that is until I switch to ragdoll mode: to which all the PhAT collision bounds have not scaled, and the ragdoll looks corrupted. How can I get the PhAT properties to scale?

I thought it would be nice to control PhAT settings in a blueprint, but if you know any other way of updating them at run time, please let me know.