'Set the extruder field of the given spool item.'

def load(self, spool_name, extruder):

    previous_spool = self._findByColumn(extruder, 2)
    if (previous_spool != (-1)):
        self.unload(extruder)
    new_spool = self._findByColumn(spool_name, 0)
    self.remove(spool_name)
    self._spool_list.append([new_spool[0], new_spool[1], extruder])
    self._save()
