I have been using Powerline for about 20 years I think now. Mixture of TL-PA4010 (not in drop downs above) and AV500s.

We moved house and I am trying to extend signal from the 150Mbs fibre router to the rest of the house

What I am finding with the tpPlc utility is that extenders are talking to eachother at over 300Mbs in the rest of the house - but the connections from these to extender next to router is more like 80Mbs. 

I have tried moving that extender to the adjacent power socket and running the ethernet cable along the floor to it from the router.

I have read that AC adaptors can put noise on the circuit. And there is one for the router, one for their supplied WiFi box and one for a small hub they supplied.

Any recomendations? Would it help to put the 3 adaptors on a block with some noise suppression? If so, what should I look for? Or what brand/model?

Mike