The greys often perch on stands on opposite sides of the kitchen. I encourage this, as that way there is no risk of them beaking each other.
But usually, before I know it, they are back to their old tricks:
Which quickly turns into Stella climbing the ladder and some jostling for position.
But, in other instances, they can be near each other without fighting. Take the shower. Lately, I've been showering with Calypso and the greys. I used to put shampoo bottles up to separate them, but that hasn't been necessary with this group.
Here are the two of them after this morning's shower, contentedly perching on one foot:
It's not until I photograph the length of the shower that you can see exactly how close they are!
Stella appears to want to be friendly with Max; I think she'd be up for some allopreening. But Max is not interested. Perhaps it's because she was an only bird for several years. Maybe someday we'll adopt a bird that will be friendly with Stella!