what exactly do I need to do in order to get the DOFF assignments to construct the deployable space turrets? I've had several of the plans for different types of turrets sitting in my bank, but I've only gotten one of the construction assignments.
Once you've done the acquire mission, the shipboard construction one will be visible when it's up.
Probably what you're seeing is what I am: They seem to have cranked down the construction assignments compared to Tribble, significantly. On Tribble there were always 2-3 of them. Now most resets I don't see any at all, and I'm collecting a good stockpile of schematics.