Can I SET UP NIGHTHAWK MR60 AS A SATELLITE TO ANOTHER MR60?

I meant the MS60 in Amazon, not MK60.  To expand I have the an MR60 with two MS60s, I want to expand to two more stellites, because it is not true that this sytems cover 5,400 sqft.  My house is a two story 2,400 house and it barely reaches my room with the router in the office, one satellite mid-house downstairs and one satellite in the middle of the house upstairs.  The previous router, a Lynksys EA9500 with extenders covered the same, but it was not WiFi 6, which my new phones have and had to manually change from extender to extender, with the same results, my room disconnects from time to time.  If I can not find a economical version to make my room work with this system, might as well return it and keep using the my previous system and wait for a better system to become available.   The Orbi is rarely available as well as the ASUS systems.  I may have to wait until next year to upgrade my system if I can not use another MR60 as a satellite.