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The file is in inches. Scale it up 25.4. I used AutoCAD to create the 3D model and exported it to STL file.

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Here's the 3D model of the subway car wall.

I changed the 3D model to get bigger window frames but I can't get Simplify3D to generate supports under the window frames which are off the build platform by about 1mm. I placed the wall with window...

If I want to create a 1/48th scale model of a subway car, what are the mimimum width, length, and thickness of objects like window frames that can be 3D printed successfully?
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