"NetOffice works fine with my EXCEL application."
the most important thing all the time ;)
NetOffice want to be an easy API without any trouble.
you want to shrink the assemblies? why?
as first you dont need any of all netoffice assemblies.
here is a part of the NetOffice deployment table from the documentation:
this is what you need to use excel.
as a second step delete the source code documentation files(.xml)
as a third step remove all unsed types and enums from source code and build your own NetOffice assemblies.
if you need signed custom assemblies, send me your modified source code.