Holding the power strip at 45 degrees makes it easy to mount plugs and power adapters, allowing for cables that go both down and upwards from the socket.
Very sturdy in PLA with 20% infill, a good snug fit for Masterplug extension power strips and prints without supports.
Update: A narrower version of the middle bracket for non-switched versions of this extension strip.
The author remixed this model.
Inverted the design and added screw points for mounting on the underside of a desk. Remodelled in Plasticity from the original STLs.