Custom Additional Fee is used if you need a to charge your customer for an extra fee whether the customer in:
- Spesific any Customer Group
- Spesific any Payment method
- Spesific any Shipping method
The fee can be set as percentage / fixed amount and only active when the cart reaches certain amount.
You can also charge multiple additional fee based on your settings.

demo OC1.5.6.4
username: additional_fee
password: additional_fee

demo OC2.X
username: demo_cf
password: demo_cf

Please contact mail me if you found any trouble with this module.
Thanks