Proses HO/OO ENGINE HOUSE w/MOTORIZED WORKING DOORS. Easy to build, detailed kit with interior lights and motorized working doors. The main building is unassembled, unpainted. The motor mechanism comes built.Opening/closing speed of doors can be adjusted with a screwdriver as needed. HO/OO Engine House with Working Motorised Doors - YouTube. Have You Seen Our HO Scale Warehouse. HO/OO Warehouse with Working Motorised Doors - YouTube. Any product you return must be in the same condition you received it and in the original packaging.