I like Emmet's heart and cube gears as well as his transmission, but I have yet to be able to slice them with Slic3r. His STL files all seem to come in with problems ( not manifold error). Even after trying Netfabb repairs, I still get the same errors. If I allow Slic3r to slice anyway, some of the bodies disappear but the holes are sliced.
Kisslicer seems to slice it OK but I'm having different problems with running it's G-code...namely the extruder retracts the set 4mm, but does not return the 4mm to continued extruding.

I was wondering if anyone else could try his files and see how well they come into Repetier and Slic3r?
Emmet's heart files: http://www.thingiverse.com/thing:243278
Emmet's cube files: http://www.thingiverse.com/thing:213946
Emmet's transmission files: http://www.thingiverse.com/thing:34778 I haven't tried this on yet.
I sure would like to know it's the files and not me. The comments on Thingiverse all say they have no problems.
TIA,
Mark