Hi - I wonder if anyone can help. I am currenlty using 3 x AV600 powerlines for desktop computers in different rooms in the house.  They are plugged in using ethernet from these devices. 

I have a couple of spots in the house that are not covered well by the wifi.  I cant get more powerlines as they need ethernet plug in and I just need wifi boosting for phones etc in these places.  I have been recommended

TL WPA 8630P/AV1300 or TL WPA 4220 Powerline 600.  I am happy to go with thiose but I want to just plug in and go.  If I get one of these will they fit with my existing powerlines or wil I have re re-set the whole system making the existing powerline redundant?  What happens to my existing Powerrline by the socket I am using for Broadband.

Many thanks for any help!!

Richard