projects/8seg: add 3D model link

content/projects/8seg/index.rst

@@ -3,6 +3,8 @@ title: "8seg"
 external_links:
     - name: Sources and hardware design files
       url: "https://git.jaseg.de/8seg.git"
+    - name: Enclosure 3D models
+      url: "https://www.printables.com/model/695260-parametric-flexible-aluminium-profile-case"
     - name: Web interface at 37C3 (congress network only!)
       url: "https://8seg.jaseg.de/"
     - name: Technical overview blog post
@@ -22,6 +24,9 @@ variety of spaces, conforming to the space's size and shape through bending and
 
 8seg is currently being set up at 37C3 in the entrance hall, on the second-floor railing in front of Hall X.
 
+By popular request, you can find 3D models for the printable parts of the power supply enclosures `here
+<https://www.printables.com/model/695260-parametric-flexible-aluminium-profile-case>`__
+
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