Be able to specify which eero a device prefers to connect to

I have 3 Eeros and a bunch of devices. For the most part they work fine and I have no issue with Wifi. The wifi connection is very good no matter which eero I connect to. My house is not that big so I sometimes see devices connect to any one of the Eeros without issue.

However, I have a Sonos system where sometimes I see issues. In particular I have a group of 3 speakers (1 pair + an additional speaker) that occasionally stop playing. Talking with Sonos support after submitting diagnostics, leads us to believe that the issue occurs when the 3 speakers occasionally connect to different eeros. When they're all connected to the same eero the problem hasn't occurred. 

I'd like to be able to specify on a device by device basis which Eero is preferable to connect to, assuming the connection is not much worse than one that would be otherwise chosen automatically. This way I can tell all my sonos speakers in the group to connect to the same eero, instead of them sometimes connecting to different ones.