The Marconi MkVIII B model came in about serial number 400, i would be interested to know what serial numbers yours are? There were various improvements to the B like the additional scan correction board and the option for HOP tubes. all introduced in a piecemeal fashion.
About the cue domes. A lot of collectors are missing them and if you do discover a way of replicating them there is sure to be some interest!
Brian
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