I have a one mesh system in an old house (there are some Stone walls) MR600 plus extenders

the MR600 is attached to an External Antenna and uses a 4G sim for Internet

I’m think maybe a BE550, Archer BE9300 as a router and the MR600 as modem may work better in the longer term, yes, I will have to update the extenders as necessary

The main reason is that the signal is fine at the router, but weak at the extenders I have

TL-WPA8631P x3 interestingly none show any clients on WIFI ?

The RE315 and RE 505x show client’s

it maybe just a quick adjustment is needed

I have assumed that these extenders will not work with the BE550

Any help would be appreciated