code: function frontBack(value) {
    var _scale = _.partial(scale, calibration.lon, 80);
  
    if (isSimilar(value, calibration.lon)) return emitter.emit('front', 0);
    if (value > calibration.lon) return emitter.emit('front', _scale(value));
    if (value < calibration.lon) return emitter.emit('back', _scale(value));
  }
docs: TODO: frontBack/leftRight can be partially applied into 1 function!