Has anyone successfully applied <Update> to <Model>?

I successfully updated (changed) a point in a placemark but I'm having challenges updating a model in a placemark.

Here's what I have so far:

doc2-load.kml:
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.1">
<Document>
<Folder>
<name>model test</name>
<visibility>1</visibility>
<open>1</open>
<description>model update test</description>

<NetworkLink>
<name>Bus Network Link</name>
<visibility>1</visibility>
<open>1</open>
<refreshVisibility>0</refreshVisibility>
<Link>
<href>http://192.168.0.4/kml/doc2.kml</href>
</Link>
</NetworkLink>

</Folder>

</Document>
</kml>

doc2.kml:
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.1">
<Document>
<name>doc2</name>
<open>1</open>
<Style id="sn_ylw-pushpin_copy0">
<IconStyle>
<scale>1.1</scale>
<Icon>
<href>http://maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png</href>
</Icon>
<hotSpot x="20" y="2" xunits="pixels" yunits="pixels"/>
</IconStyle>
</Style>
<Style id="sh_ylw-pushpin_copy0">
<IconStyle>
<scale>1.3</scale>
<Icon>
<href>http://maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png</href>
</Icon>
<hotSpot x="20" y="2" xunits="pixels" yunits="pixels"/>
</IconStyle>
</Style>
<StyleMap id="msn_ylw-pushpin_copy0">
<Pair>
<key>normal</key>
<styleUrl>#sn_ylw-pushpin_copy0</styleUrl>
</Pair>
<Pair>
<key>highlight</key>
<styleUrl>#sh_ylw-pushpin_copy0</styleUrl>
</Pair>
</StyleMap>
<Style id="sn_ylw-pushpin">
<IconStyle>
<scale>1.1</scale>
<Icon>
<href>http://maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png</href>
</Icon>
<hotSpot x="20" y="2" xunits="pixels" yunits="pixels"/>
</IconStyle>
</Style>
<Style id="sh_ylw-pushpin">
<IconStyle>
<scale>1.3</scale>
<Icon>
<href>http://maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png</href>
</Icon>
<hotSpot x="20" y="2" xunits="pixels" yunits="pixels"/>
</IconStyle>
</Style>
<StyleMap id="msn_ylw-pushpin">
<Pair>
<key>normal</key>
<styleUrl>#sn_ylw-pushpin</styleUrl>
</Pair>
<Pair>
<key>highlight</key>
<styleUrl>#sh_ylw-pushpin</styleUrl>
</Pair>
</StyleMap>
<Placemark id="Bus">
<name>Bus Model</name>
<styleUrl>#msn_ylw-pushpin_copy0</styleUrl>
<Model id="model_1">
<Location>
<longitude>-105.2819807268294</longitude>
<latitude>40.03631152655522</latitude>
<altitude>0</altitude>
</Location>
<Orientation>
<heading>0</heading>
<tilt>0</tilt>
<roll>0</roll>
</Orientation>
<Scale>
<x>1</x>
<y>1</y>
<z>1</z>
</Scale>
<Link>
<href>http://192.168.0.4/kml/models/hop.dae</href>
</Link>
</Model>
</Placemark>
<Placemark>
<name>Untitled Placemark</name>
<LookAt>
<longitude>-105.2812472062487</longitude>
<latitude>40.03065749636099</latitude>
<altitude>0</altitude>
<range>2656.634578452202</range>
<tilt>69.56835621775275</tilt>
<heading>6.688056471642268</heading>
</LookAt>
<styleUrl>#msn_ylw-pushpin</styleUrl>
<Point>
<coordinates>-105.2819807268294,40.03631152655522,0</coordinates>
</Point>
</Placemark>
</Document>
</kml>

doc2-reload.kml
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.1">
<NetworkLink>
<name>Update</name>
<Link>
<href>http://192.168.0.4/kml/doc2-update.kml</href>
<refreshMode>onInterval</refreshMode>
<refreshInterval>3</refreshInterval>
</Link>
</NetworkLink>
</kml>

doc2-update.kml
<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.1">
<NetworkLinkControl>
<Update>
<targetHref>http://192.168.0.4/kml/doc2.kml</targetHref>
<Change>
<Model targetId="model_1">
<Orientation>
<heading>90</heading>
<tilt>30</tilt>
<roll>60</roll>
</Orientation>
</Model>
</Change>
</Update>
</NetworkLinkControl>
</kml>

When I load up doc2-load.kml the model shows up where I expect, however when I load up doc2-reload.kml the model is unaffected.

Thanks