I need to change the layer of any countersink outside diameters when I export a sheetmetal drawing file to DXF.  The export to dxf/ dwg from the part environment removes the countersink OD's, as well as, any other geometry that is not needed for cutting on a laser.  I'm using a macro currently to do some other things prior to saving to dxf.  Is there a way to identify the edges of the countersinks and then change there layer prior to saving?