I know this was discussed, but I didn't get it then. How do you add a hanger to a Rebellion ship? Do you use one of the bones for another piece of the ship?

I'm pretty sure you can, but I'm not sure whether that will put 2 hardpoints super-imposed over each other. Either way, just set it up like the hanger on Imperial ships and attach it to a bone that's in the general vicinity of where the hanger should be. If it ends up super-imposed, which I'm not sure it will, then just make it non-targetable.

I got it to work, it's right on top of the engine on the mon cal ship.