Board Thread:General Discussion/@comment-31526850-20170714174001/@comment-31354887-20170721093524

It wouldn't be a astromech slot though, it would be a "Imperial Astromech" slot.

FFG sort of boxed themselves into a corner in the beginning by not making any of the named astromechs (Like R2-D2 and R5-P9) carry the 'Rebel Only' restrictor. When they released scum as a playable faction rather than go back and errata all the unique astromechs to 'Rebel Only' they instead came up with the 'Salvaged Astromech' upgrade which replaced the astandard astromech slot on the scum Y-wing (funnily enough Rebels can now use salvaged astromechs themselves to some extend with the Havoc).

Most likely if any imperial ship is released that has a astromech slot it will have a entirely new upgrade slot just for imperial astromechs.

The whole thing is sort of a mess already, they really should have just errated the unique astromechs to their respective factions. (Of course then we'd have ARC-170s flying around with Unhinged Astromechs and Nein Nunb and WAY to many greens.)