Soldato
I used 5mm ply, drilled holes through the ply and into the wall.
Then used screws though a cup (showing on the front face of the ply), the ply then a rubber washer to stand off the wall and take some flex and screwed into the wall using rawl plugs.
Then used screws though a cup (showing on the front face of the ply), the ply then a rubber washer to stand off the wall and take some flex and screwed into the wall using rawl plugs.