Initialise a wix CheckBox's check state based on a property?

Question

How does one initalise a Wix check box based on the value of a property?

So far, I've done the following:

<Control Id="Checkbox" Type="CheckBox" X="0" Y="0" Width="100" Height="15" Property="CHECKBOX_SELECTION" Text="I want this feature" CheckBoxValue="1" TabSkip="no">
 <Condition Action="hide">HIDE_CHECKBOX</Condition>
  <Condition Action="show">NOT HIDE_CHECKBOX</Condition>
</Control>

Currently I have two custom actions to set HIDE_CHECKBOX and CHECKBOX_SELECTION. The CHECKBOX_SELECTION custom action occurs immediately after the HIDE_CHECKBOX action.

What I'm seeing is that HIDE_CHECKBOX is behaving correctly (ie. the checkbox is hidden) which suggests that I've got the ordering of custom actions correct, but CHECKBOX_SELECTION is not changing the check state of the check box. Is this a safe assumption? Also, I've confirmed that SELECTION is being set to '1' in the logs.

Am I on the right track? Have I misssd anything?