So, as far as I can tell, I finished the map last night (finished in the usual "It will always require just this last one small adjustement " sort of way).


So, here is the central complex the players will initially discover:
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Here are the rooms behind the secret door:
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And here is an overview of the whole complex:
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My plan is to print everything, paste them over two of three A3 paper sheets and use these as battlemap (come to think of it, maybe I should have started this thread in the battlemap section)...
It was actually surprisingly fast to do...