So much disagreement about engraving out there so I want to ask a very specific question. Has anyone actually, physically gotten ATF approval without engraving if they are simply making an SBR from an existing serial numbered non NFA rifle or pistol? This is my first round with ATF and the Internet is flooded with negativity and argument about wether or not you need to engrave a receiver that already has a serial number and manufacturer name on it. Thank you in advance to anyone who responds with clear and precise direction. Please respond privately to limit the public conversation if you would like, I don't want to hear from anyone who has not gone through the process completely. Thanks.