@RGaskell Changed to access point. Main deco now gets 700mbps, satellite one gets 450mbs (strong signal - room above router) and satellite two gets 300 mbps (medium signal) If a speedtest is running...

@RGaskell mac cat 6 into router : mac cat 6 into either ethernet port on master deco:

I cant see the M9 on amazon now. What about the TP-Link Deco X55 AX3000? Although its not tri-band....

As per this reply from support. Please advise what my best options are to ramp up speed across my house: https://community.tp-link.com/en/home/forum/topic/622572?replyId=1252896 I've now upgraded to...

@Alexandre. thanks I'll give it a try

@Alexandre. If Ethernet cable is not an option, do you have TV (coax) cables that terminate near Main and Satellite units? If you do, I can give you more info on what adapters to buy that will pass...