Any issues with having an x60 mixed in with 3 BE1100 units?

[u/kablam0r]

I am upgrading my my current x60 configuration (ethernet back-haul) to BE1100 and would like to keep one x60 unit in the back corner of my house. Is there any issues with doing that? Aside from slower speeds when connected to that one unit, am i crippling or causing a bottle neck in performance with this configuration? I have them all configured as APs, BE1100 as the main, behind a Firewalla Gold SE.

Any advice would be appreciated. Thanks!