Airspeed AS51 Horsa Glider Query.

At the Jet Age Museum we are beginning to repopulate the Pilot Instrument panel of our Airspeed AS51 Horsa Assault Glider cockpit project, and, in spite of extensive research, we have been unable to establish the layout of the instrument panel Suction, Pitot and Static pressure pipe runs.
There are many photographs of the front of the panel, but very few indistinct examples of the panel rear, and no information whatsoever in the Pilot Notes.
Both the British examples, (the De Havilland restoration and the example at the Museum of Army Flying) are incomplete, and they are unable to supply accurate information that will assist.
If anyone possesses a drawing or a complete, accurate photograph of the above-mentioned pipe runs, any assistance would be much appreciated.
We assume the individual instrument interconnections are similar to a standard Blind Flying Panel, but, we also need to establish whether the system includes a Vacuum Pressure Reducer Manifold, and a Pitot/Static Manifold Block, and their relevant locations on the  Instrument panel, as well as the routing of the pipes.