I am in the process of gearing up to build my bulgy krink. I have read alot about engraving the receiver with name, city and state. Is this info needed? I am building from a demil bulgy krink using a NoDak receiver. If I do need to engrave it why? I don't see anything on the form refering me to do this. Unless it is refering to item 4a but NoDak is the original manufacturer of the receiver correct? Or is item 4a to be filled in with my info because I am assembleing the firearm from parts (in reference to definition 2i)? Any information is welcome.