I have seen multiple articles explaining that one can connect two (only) X60 via ethernet backhaul. My question is if it is supported to network all x60 together directly in series to achieve ethernet backhaul. Example

isp router - - wan1/ 1x60/lan2 - - lan1/2x60/lan2 - - ....

That way all Deco X60 devices will have underlying 1Gb connection. 

Is this supported? 

Mostly is it supported to have a ethernet backhaul with the main router not just between satellites?

Best regards