Putting Global Variables into Cut List Properties or Custom Properties (Need Help)

I am setting up a cut list for some components I have.  They are a bent metal component (round) and have arcs on them so using the arc length dimension I have the approx. length for my stock size setup as a Global Variable.  Having this setup I can put a true length in.  However I am unable to call up this variable in the cut list and am wondering how to call up a Global Variable in the Cut List Properties or the Custom Properties dialog boxes?

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