I have the cockpitvloer improved by the ‘Manual gear extension access by’ adding to it.

This panel is found at the rear right of the ‘avionics pedestal’ and need to manually the landing gear to activate.

I have this version of the ‘Manual gear extension access by’ only with the ‘door’ (panel) that is mounted on the cockpitvloer.
The facilities such as the compartment under the floor with the different handles with I omitted.

Info and images : http://www.flightdeck737.be/hardware/platform/cockpitvloer/manual-gear-extension-access-door/