Probably need at least one (or maybe 2) more guy(s) to dress on game day. I don't see anyone from the first 2 preseason games you'd want to dress besides Edwards. Active roster but not dressed - Evans is a candidate there. Practice squad - probably several guys. Demby is practice squad (if he's still eligible) or cut.
This is why I think we need to bring in one more guy, a vet, who can fill in at guard / RT. Notebloom can play tackle, Blythe can play center - but that leaves a guard slot open in each scenario. Edwards can handle that, but need one more.