[Solved] Custom Ratings meta key

Hello!  I'm relatively new to wpDiscuz and so far I love it!  Unfortunately, I've run into an issue that I hope you can help with. 

I'm adding wpDiscuz to a food blogger site.  The site uses a plugin called WP Tasty to create recipe cards and it also does comment ratings.  They store ratings in a comment meta key "ERRating".  When I tried to add this in wpDiscuz using the form builder, it saves the value as "errating" (lowercase) which will not work with Tasty.  Is there any way to allow upper/lowercase for the meta_key value for the Ratings field?

If the above is not possible, do you have any developer documentation for adding custom fields to the comment form?  I could write something to integrate the Tasty functionality into the form given the appropriate actions/filters for wpDiscuz.  I tried hooking into do_action('comment_form_top') but the field needs to be inside the <form> tag.

Any assistance you can provide would be greatly appreciated!