I'm trying to adapt this example (http://community.infragistics.com/forums/p/50183/264009.aspx#264009) to the XamRadialGauge control.  I've done this for the XamLinearGauge control without issue.  I almost have it working for the radial gauge, however the needle refuses to display. 

I've attached a demo project that illustrates a simplified version of what I'm trying to accomplish.  The main view creates two XamRadialGauge controls, both initialized with identical gauge elements.  The first is initialized through a dependency property, the second through the view constructor.  All of the elements in the unbound gauge appear; all of the elements *except the needle* appear in the bound gauge.

Can someone shed some light on this one?

Obliged,

jim