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Observatory Module Expansion


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The Observatory Module Expansion set contains OpenLOCK walls to build round buildings and radio telescope. These can be used for populating scenes in a modern or sci-fi setting for tabletop skirmish and role-playing games.

Download the Rampage Base Pack for free to get the latest version of the OpenLOCK clip.

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This product is delivered as a .ZIP file pack containing STL files for use on a home 3D Printer. The files are set to 28mm scale but can be rescaled before printing.


Science has meant the advancement of human experience in inhospitable environment. On the frontier of space, science continues unabated.

To build with this expansion you will need the core Operating Base Modules set.


  • Right-click on the image below and “Save As” to download the reference sheet for this pack.
  • Product measurements can be found in the image gallery.
  • First Published version 1.1

Additional information



Layer Height

.1 high quality


Prints without Supports

1 question for Observatory Module Expansion

  1. Robert Crichton (verified owner)

    I’ve been printing this out, and having a problem with the locking pins on the walls. They are noticeably larger(about 3.7 mm) than the locking pins on other wall pieces(about 3.1 mm), and do not fit in the matching holes in the roof pieces. I compared to the pins on the Command Center walls, the pins on those pieces easily fit the holes on the Observatory roof pieces.
    Is there an update to this expansion coming soon?

    • Sam Campbell (verified owner)

      We’ll get this updated.

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