Custom MahApps Button Style

MahAppsButton.xaml

    <Style x:Key="MahApps.Styles.Button.Custom" TargetType="{x:Type ButtonBase}" BasedOn="{StaticResource MahApps.Styles.Button}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ButtonBase}">
                    <Grid>
                        <mah:ClipBorder x:Name="Border"
                                        Background="{TemplateBinding Background}"
                                        BorderBrush="{TemplateBinding BorderBrush}"
                                        BorderThickness="{TemplateBinding BorderThickness}"
                                        CornerRadius="{TemplateBinding mah:ControlsHelper.CornerRadius}"
                                        SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                        <mah:ClipBorder x:Name="DisabledVisualElement"
                                        Background="{DynamicResource MahApps.Brushes.Control.Disabled}"
                                        CornerRadius="{TemplateBinding mah:ControlsHelper.CornerRadius}"
                                        IsHitTestVisible="False"
                                        Opacity="0"
                                        SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                        <mah:ContentControlEx x:Name="PART_ContentPresenter"
                                              Margin="{TemplateBinding BorderThickness}"
                                              Padding="{TemplateBinding Padding}"
                                              HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
                                              VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
                                              Content="{TemplateBinding Content}"
                                              ContentCharacterCasing="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=(mah:ControlsHelper.ContentCharacterCasing)}"
                                              ContentStringFormat="{TemplateBinding ContentStringFormat}"
                                              ContentTemplate="{TemplateBinding ContentTemplate}"
                                              ContentTemplateSelector="{TemplateBinding ContentTemplateSelector}"
                                              RecognizesAccessKey="{TemplateBinding mah:ControlsHelper.RecognizesAccessKey}"
                                              SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter TargetName="Border" Property="Background" Value="{DynamicResource MahApps.Brushes.Gray8}" />
                            <Setter TargetName="Border" Property="BorderBrush" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=(mah:ControlsHelper.MouseOverBorderBrush), Mode=OneWay}" />
                        </Trigger>
                        <Trigger Property="IsPressed" Value="True">
                            <Setter TargetName="Border" Property="Background" Value="{DynamicResource MahApps.Brushes.Gray7}" />
                        </Trigger>
                        <Trigger Property="IsKeyboardFocusWithin" Value="True">
                            <Setter TargetName="Border" Property="BorderBrush" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=(mah:ControlsHelper.FocusBorderBrush), Mode=OneWay}" />
                            <Setter TargetName="Border" Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=(mah:ControlsHelper.FocusBorderThickness), Mode=OneWay}" />
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="False">
                            <!-- changed from 0.7 to 0.5 -->
                            <Setter TargetName="DisabledVisualElement" Property="Opacity" Value="0.5" />
                            <!-- changed from opacity change to foreground change -->
                            <!-- <Setter TargetName="PART_ContentPresenter" Property="Opacity" Value="0.3" /> -->
                            <Setter TargetName="PART_ContentPresenter" Property="TextElement.Foreground" Value="{DynamicResource MahApps.Brushes.Gray6}" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>