[Jonathan Moore]

Around the opening of this cover there is a radiused section, best shown in this picture.

Also there is a 15mm gap right around the covers, too big a gap to be just clearance. I had assumed that it was a rain water channel but the more I studied the pictures I realised that the reason for the large gap and the radiused section was to allow air into the engine bay around the sides of the covers but I assume, not allow splinters to enter. On the original tank the two covers were not locked together, the lower over had no locking mechanism being held in place by it's own weight and the top cover having a locking mechanism. In my tank the covers lock together, as the lower door is not heavy enough stay in place on it's own.

The radio operators escape hatch mow has it's latch and handle.