OK, so bumping up an old thread, I just want to make sure I'm doing this correctly. I am making my C39 pistol into an SBR and have a trust setup. I fill out the form 1 with all the info about my trust and the gun, do I need to have it engraved with my trust name and city prior to sending the form or can that be done while I am waiting for approval? Since I have a trust and would send a copy of it, will I need my pic and prints to go along with the form 1?