Hi Russell,
Thanks for using Syncfusion products.
You could bind to other columns as "{Binding Path=Record.Data.SampleColumn2}" in our latest build 7.4.0.20.
For our previous build you use like this "{Binding Path=Record.SampleColumn2}".
Download the workaround sample in the following location.
http://www.syncfusion.com/uploads/redirect.aspx?file=GDCSample_ad090803.zip&team=developmentPlease check with this and let me know if this helps you out.
Thanks
Ganesan