Any ideas about how to standardize a customized shape corner (similar to 'Format Painter')?

As seen in the image below, you can customize how round the corners are of a shape. 

I have a number of shapes in a lesson that have slightly different levels of rounding at the corners. In most cases it is noticeable when switching from slide to slide.

I know I could delete all the shapes and copy and paste one shape many times, but does anyone know if there is a quicker way? Like the Format Painter option? 

For example: I tested setting one of the shapes as the 'Default Shape' and changing the other shapes to circle and back to a rounded-corner rectangle, but that didn't work.

Hoping there is a quick fix, if not for this lesson--for the future when it inevitably happens to me again : ) 

Thanks so much!
Have a great weekend 😀