As to the other questions, the code does not inspect your admin form to identify anything that may have been added or modified. It was manually put together to consider the base product information with the ability to expand on the use of additional product table fields as user identified fields. So if your additional dimensional fields have been added to the products table then in the EP4 configuration, if you go to the user defined fields you will want to add each desired field. When entering the field(s), separate each by a comma. The field should be entered as shown in the database (do not use the prefix of v_ unless it exists in the database). For example if the field is called products_length, then products_length should be entered in the user defined entry. Export of the products data will produce a v_products_length column and then whatever data is entered into that field for a row will be populated in the database with that information.