these days I had a look at the approach of your SAP accelerators. A very interesting approach to map the interface of SAP function modules in Excel sheets.
Here I have a suggestion for improvement:
In some cases a field, that is marked as mandatory, may have a default value. This information can be very interesting for filling an interface.
My suggestion is to add an additional row, in the Excel Sheet of the function module interface, with the Default Value of the field. So you also have this valuable information available at a glance.
Thanks and best regards