From what I can tell, when I set up my form to save in a custom table DF is still saving the data in it's Question Response table.

Surely I'm doing something wrong as saving two sets of data, only one of which is needed or used,  is going to hurt disk space and system performance. Since I can't see Data Springs setting up a module this way I must be doing something wrong or misunderstanding something which is entirely possible.

What am I missing?

HI, you have two options. If you are using your own custom SQL table, then
1) for any question field you do not want to save to DF response table, go to Advanced Field option and check "do not save field result to database"
2) if you do not want all fields on a form to be saved to the DF response table, then go to Advanced Feature / Advanced Field Wizard under the little arrow drop down next to Dynamic Forms page, and check all the fields and choose action of "do not save field result to database" -- David

Very good! I figured it was something I was missing.

Thanks much for the reply David!