Hi,
The solution does not have to be in uStore, a simple way to achieve that is via rule (uPlan\uCreate).
Your dial should be a variable, let's assume called "MyDialVar" and the ADOR (that is used in the design) rule should be:
if(IsNullOrEmpty(@{MyDialVar}))
"My Default Value"
else
@{MyDialVar}
That means that if the customization of the "MyDialVar" is left empty, the default value will be shown in the preview.
You can even create a more complex rule that decides a different default corresponds to other dials already populated by a user.