I've only done the 2 Form 1's, but I'm telling you if you put anything in your description or photos that looks like you're going to use any premade part it's an instant denial. According to their "new interpretation" of the law any and all parts intended to be used for a suppressor are already a suppressor and hence illegal and they have been confiscating solvent traps. Or trying to. And if you order solvent trap parts from out of the country they confiscate them at customs and send you a letter about them being illegal and threaten you with charges. Plenty of videos on YouTube of people telling what happened to them.
Take it for what it's worth.