Here are a couple of maps of the primary Rhem 2 locations for those adventurers who are perhaps a little lost and confused:
After playing the game umpteen times and much sketching, crossing out and redrawing I had the thing ready for scanning. Next job was to clean it up, correct the errors, colour and label. Only to about a million hours to do. Hope it helps.
If you have found this walkthrough useful, discovered an error or have a suggestion then let me know: feedback.