ACHEFT-Debit possible with webform_civicrm?
That is now possible! For both CAD and USD.


Pull latest webform_civicrm module: 
git clone https://github.com/colemanw/webform_civicrm 
Pull latest iATS Payments extension: 
git clone
https://github.com/iATSPayments/com.iatspayments.civicrm


Example of USD Checkout: