The M9 is my main. Allso I have 4 M5's (4 floors in the house). It works fine but could the speed and coverage be better if I changed the M9 (and placed it elsewhere) for a 'stronger/bigger' main...

Measuring internet speed (cabled) with the deco app gives me around 500 mbps. Measuring wireless speed just 25 cm from the first deco (attached to my router) gives me around 180 mbps. Is this the...