Slic3r PE - Missing supports
Apologies for sticking all my images together but this forum is limited to three attachments so I didn't have much choice. Also, STL and GCODE files are not allowed so I had to stick them in a zip file.
Slic3r PE appears to be missing supports from an STL i am trying to print (STL & GCODE files in attached zip).
Figure 1: Bottom-up view.
Figure 2: This is the view as the thing will be printed.
Figure 3: Side view on plate.
Figure 4: Top view when printed.
Figure 5: Bottom view when printed.
Supports are created for the 8 x small ledges half way up the perimeter of the object but no supports are created for the underside of the object... this is fairly obvious if you look at figure 5.
My settings are below in case that helps (they are default except that "Generate support material" is checked).
Is there something that I am doing wrong?