After fighting with slic3r all weekend I decided to go with simplify3d (yes, not open source I know, but its been rock solid for me on my work printer)
I have the following now working perfectly on the Materia 101 and printed a complete stem engine model with all parts fitting perfectly.
- Add the Sharebot Kiwi 3d profile to simplify3d.
- Place the parts to the front of the bed
- When printing choose PLA (not from gcode)
- Print away
Hope this helps others who have bought/built the Materia 101