@Solla-topee - thanks for the response, appreciate it. I think the TL-WPA7510KIT is what I'll settle for. Yes, would be good to be able to purchase add-on units as the need arises...can't understand...

Hi all. Just bought TP-Link TL-PA717 kit. I've used bold text because I cannot actually find this item in the models dropdown above...neither can I find it on the TP link product pages but it does...