Can I save a brush variant as a default?

I have some brushes created that I really like.  I would like to be able to set each of their settings as default so if I make changes on the fly while using them then I can hit the "Reset" button and have them revert back to the custom settings that I initially gave them when I made the variant.  I do not want them to refer back to the settings of the original brush I used to create the variant.

Thanks for any help with this.