I've got an UltraTree that's being bound to a custom list of objects containing two levels. In other words, I'm setting its DataSource property to an object like this:

Group (implements IBindingList<Object>)
   Group (named "base")
      Object ("Fred")
      Object ("George")
      ...

This displays a tree like this:

base
   Fred
   George

This works fine as long as I let the tree generate its own column sets. I've created two column sets using the Designer, and what I'd like is for 'base' to use one of them and for the second level nodes to use the other one. I'm doing this:

treeViewMain.NodeLevelOverrides[0].ColumnSet = treeViewMain.ColumnSettings.ColumnSets["NameOnly_ColumnSet"];
treeViewMain.NodeLevelOverrides[1].ColumnSet = treeViewMain.ColumnSettings.ColumnSets["WorkOrder_ColumnSet"];

This works fine for level 0 ('base'), but it doesn't seem to do anything at level 1. If I look at the DataColumnSetResolved property of the level 1 nodes, they refer to a column set named 'Children' that seems to have been automatically generated.

How can I convince the level 1 nodes to use my second column set?

Thanks,
   Aaron