I have received a few PM's asking for me to clarify why I think the zone of focus should be the edge of the Outer Arm and beyond, so here it goes.
We start with this nugget of information,
"Edge of the Galactic Arm. Take a line from Reorte to Riedquat to the edge of the arm and ... keep going. 'Stars thin out, you can see the whole galaxy just hanging there."
We then isolate the keyword Galactic,
ga·lac·tic
(gə-lăk′tĭk)adj.1. Of or relating to a galaxy, especially the Milky Way.
2. Of enormous size; immense.
In every case the word galactic infers the entire galaxy as a whole. The galactic plane, The galactic center, The galactic rotation, The galactic poles. etc...
So in our case, unless Drew contextually mis-used the word galactic (which I highly doubt) we are left with the galactic edge being the edge of the Outer Arm and beyond. This ties into "you can see the whole galaxy just hanging there." "it's been possible since launch" meaning the system to get to is very hard but possible. And "The engineers may make it easier" Etc..
If he meant the edge of the Perseus Arm and keep going I would suspect he would have used a word other than galactic, such as inner, spiral, etc.. Which still leaves it in an envelope of mystery and nebulousness. This is of course pure speculation but it is rooted in the logic of it all.
As for Salvageable Wreckage POI's, discarded, as they were not in at launch. And don't forget to 3D search some systems randomly!