RibbonCheckBox alignment in a RibbonGroup - wpf

Question

<RibbonWindow x:Class="xxx.yyy"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
...
<Ribbon x:Name="mainRibbon" Grid.Row="0" >
...
<RibbonTab Name="ComparisonTab" HorizontalContentAlignment="Left" Header="Comparison" >
<!--<StackPanel Orientation="Vertical" HorizontalAlignment="Left">-->
<RibbonGroup HorizontalContentAlignment="Left" Header="Images" >
<RibbonCheckBox HorizontalAlignment="Left" Width="200" IsChecked="{Binding CompInfo1Check}" Label="{Binding CompInfo1Text}" />
<RibbonCheckBox HorizontalAlignment="Left" Width="200" IsChecked="{Binding CompInfo2Check}" Label="{Binding CompInfo2Text}" />
<RibbonCheckBox HorizontalAlignment="Left" Width="200" IsChecked="{Binding CompInfo3Check}" Label="{Binding CompInfo3Text}" />
</RibbonGroup>
<!--</StackPanel>-->
</RibbonTab>
I have some checkboxes with a dynamic text (labels) and I want to have them left aligned within a ribbon group.
I've tried every imaginable combination of Horizontal(Content)Alignment on them and on their parents. I tried to put them into a container (StackPanel, Grid). I even tried to set a label as a separate element.
The checkboxes stubbornly remain centered within a ribbon group. How do I align them horizontally to the left?

Answer 1

I've found a workaround in using standard check boxes inside a ribbon. There is no problem with their alignment. They could be styled to look as the ribbon check boxes, if required.
So, the modified xaml is:
<RibbonTab Name="ComparisonTab" HorizontalContentAlignment="Left" Header="Comparison" >
<RibbonGroup Header="Images" >
<StackPanel Orientation="Vertical" HorizontalAlignment="Left">
<CheckBox Height="25" IsChecked="{Binding CompInfo1Check}" Content="{Binding CompInfo1Text}" />
<CheckBox Height="25" IsChecked="{Binding CompInfo2Check}" Content="{Binding CompInfo2Text}" />
<CheckBox Height="25" IsChecked="{Binding CompInfo3Check}" Content="{Binding CompInfo3Text}" />
</StackPanel>
</RibbonGroup>
</RibbonTab>
EDIT
Probably a better way is to use a grid, RibbonCheckBox without a label and a TextBlock instead.
Explained here.