Wireless remote STL file error: lower_part.stl has a glitchy floor

[rdancer]

Affected documentation page

https://opensourceebike.github.io/remote/build_remote.html

Affected file

https://opensourceebike.github.io/remote/lower_part.stl

Expected behaviour

part should look like the rendering:

.

Actual behaviour

Part is missing the floor, or rather depending on the editor/viewer, the floor is either missing, or glitchy, or visible as solid only when viewed from below with camera looking upwards.

Some parts of the screw shafts are also missing in OS X Preview, for what that's worth (but the actual 3D printing software is more important.

Tested with

Merialise Magics

TinkerCAD.com

OS X Preview

[casainho]

Yes but it prints as it should. I do not know how to fix that.