@creedon back for more here. Trying to tweak your code to work for form fields other than email. Specifically, I have a hidden field whose value I'd like to pass as a parameter on redirect. The hidden field does have a name, so I assumed I would just change the value from .email to .<hidden field name> however I'm not able to get it to work as hoped.
P.S. I had also looked at passing a text field in my form but found that those fields do not have a name attribute, only an id. Perhaps there's a tweak to make where I can use ID to identify the field I'd like to pass?
Thanks!