I'll do some testing about memory usage of various sizes and content of unpacked docx files...Do understand that because of how the injection works the document cannot be edited afterwards or the injection will be removed upon saving, so a prepared "legal statement" or  "report" could end up in the few MB's compressed I think. 

I like kernelsmiths idea of allowing an ?advanced? option to still save to disk when memory usage is an issue. Once I have some numbers I'll look you up on IRC to discuss how to best proceed with this.