The trick:use a 0.8 mm nozzle [instead of standard 0.4mm]print with layerheight 0.4now the difficult part: first 2 layers printed with fill [set layer 0 to 2 in carve menu]from layer 2 - 99999 printed without fill [also set in carve menu]merge both files in text editor, make sure you add G92 E0 (zero the extruded length) just before the second part and cut away the gcode you don't needheat up and go!tip for skeinforge developpers: will it be possible to 'chain' profiles in the future...?