Conditional display of Formsnap 3 fields through arrays in Pi?

I'm trying to work on a form using yabdab's Formsnap 3, where some fields in the form are conditionally displayed depending on the status of formsnap's radio buttons.. eg:

Are you a business? (Yes / No radio buttons)
Business Name: (text field)

The Business Name field only needs to be displayed if the "Are you a business" radio button YES is true.

FormLoom supports conditional fields, but it doesn't work how I want it to - where formsnap appears to.. aside from this..

I was thinking of using Pi and the Display CSS to show or hide the container with the conditional fields, but I'm struggling to create a custom function in Pi to determine the status of the Formsnap radio buttons.. anyone know if this can be done at all?

Thanks,

J.