[flexcoders] Charting: Selectively removing filters for one itemRenderer

[jeanette_stallons]

Hi 
I want to keep all the default drop shadow filters except on the data
points for one series on a LineChart. 

I can successfully remove all the filters (by either setting the
seriesFilters equal to an empty array on the LineChart component or by
changing the LineChart to a CartesianChart) and then add back the drop
shadows as required, but how do I do this the other way around? ie
just removing the filters for one specific itemRenderer? 

I tried setting the filters property equal to an empty array for the
itemRenderer as shown below, but this didn't work.

<mx:LineSeries id="s1" xField="A" yField="B" radius="20">
  <mx:itemRenderer>
    <mx:Component>
      <mx:CrossItemRenderer rotation="45" filters="[]"/>
    </mx:Component>
  </mx:itemRenderer> 
</mx:LineSeries>

I also tried setting it with AS, setting it equal to an intermediate
empty array as discussed in the docs (here on the series instead-
which i also couldn't get working):
<mx:LineSeries id="s1" xField="A" yField="B" radius="20"
initialize="init()">
with
public function init():void{
var temp:Array=new Array();
    s1.filters=temp;
}

But no go. What am I missing?
Thanks!
Jeanette