Does anyone know how to you can add major/minor diameter variables to cosmetic thread hole callout in calloutformat.txt file?

Example:

1/4-20UNC-2B

mD .1960/.2070

I would like to show the minor / major diameter range on our production drawings when you use the hole callout vs. looking them up each time.

When you add the minor diameter variable to the callout format file it comes in as ".00"

Thanks

Brad