I have an existing M9plus 3 node mesh that works well except for weak signal in an outbuilding. I'm planning on adding P9's to the mesh to get powerline backhaul to the outbuilding to improve performa

I currently have 3 M9plus units in a 4200 sq ft ranch. Works great. During the summer I want to move one of the units to a pool house (75' and a brick wall from other Deco) for for better outdoor cove