[Jonathan Moore]

The third method of seeing the road ahead, is through the two small holes above the vision slot as mentioned above. To achieve this one has to use a periscope that is attached to a rail bolted to the roof of the upper hull. As yet I haven't made the periscope, that's the next job but I have made the attachment rails.
And the blanking block that covers the vision holes when the periscope is not required.