Hi all, I have same situation here, we have 4 rb800, 2 rb800 (backhaul link) with two r52hn they appear to work ok, only thing it’s that speed on backhaul link drops from 150mbps to 16mbps (some days even lower), and the other two rb800, with daughterboard (rb604) each and 4 r52hn each, they work ok...