Image search results - "imperial sentry droid"
Rough_3D_Model.zip
 Shawn's 3D Model of H015 Sentry Droid67 viewsThis is a fairly accurate 3D model of the outer shell of the sentry droid. It is provided in several formats.

Additionally, there's a "flat" PDF (& cdr) of the panels which can be printed at 100%. Note, however, that the panels are the front faces and don't account for the depth of whatever material you might cut, so you'll either need to cut them a hair smaller, or sand/fill, etc. if you try to use those to build a model.

The "skirt" fits over the Lego greeblies in this version.
Sentry_Power_Switch_28129.jpg
 H015 Sentry Power Switch14 viewsIn London we noticed that the power button (I assume it's power) is hidden on back of the black waist. When pressed the white stripes go away.
Star_Destroyer_Droid_H015.jpg
 Star Destroyer H015 Imperial Sentry Droid11 viewsOliver said this is close to final model. He said they called it the H015 or Imperial Droid or something like that on set. The book says "Star Destroyer H015"
   
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