So, I'm making some modifications on my Lego Y W-wing and I'm not sure if there were R2 or R5 units in the slot. I know there were no droids on screen in the Death Star run, but there were different droids in the hanger, right? So are there R2 or R5 droids depending on the ship? Is there a history of Y-Wings thread that I am missing for this info?! Thanks!