Need to Add and Remove Columns of ADF Read Only table from Backing bean

I have a scenario where I am trying to Populate TransientVO which is shown has a ADF Read Only Table in page.
I have couple of Check Boxes Based on their selection I am trying to render and hide certain Columns.
But the Issue which I am facing is only the Column Header seems to change where as the Rows and Values doesnt..
even If I apply the expression language rendering condition on the outputText inside those columns.. ..
So I am thinking to add and remove VO Attribute columns to the table from backing bean.
Need some sample code snippet or a better design to achieve this. Its kind of urgent too...having an aggressive deadline :(
Please chip in People..
Thanks in Advance .
TK

Table Code..
<af:table value="#{bindings.InventoryGridTrans.collectionModel}"
                                var="row"
                                rows="#{bindings.InventoryGridTrans.rangeSize}"
                                emptyText="#{bindings.InventoryGridTrans.viewable ? 'No data to display.' : 'Access Denied.'}"
                                fetchSize="#{bindings.InventoryGridTrans.rangeSize}"
                                rowBandingInterval="0" id="t4"
                                partialTriggers="::sbcSales ::sbcUsage ::cb1">
                        <af:column sortProperty="Period" sortable="false"
                                   headerText="#{bindings.InventoryGridTrans.hints.Period.label}"
                                   id="c38">
                          <af:outputText value="#{row.Period}" id="ot33"/>
                        </af:column>
                        <af:column sortProperty="Past12SalesCount"
                                   sortable="false"
                                   headerText="#{bindings.InventoryGridTrans.hints.Past12SalesCount.label}"
                                   id="c29"
                                   rendered="#{backingBeanScope.IndexPageBackingBean.onUsage != true and backingBeanScope.IndexPageBackingBean.onSales == true}">
                          <af:outputText value="#{row.Past12SalesCount}"
                                         id="ot40"
                                         rendered="#{backingBeanScope.IndexPageBackingBean.onUsage != true and backingBeanScope.IndexPageBackingBean.onSales == true}"
                                         visible="#{backingBeanScope.IndexPageBackingBean.onUsage != true and backingBeanScope.IndexPageBackingBean.onSales == true}">
                            <af:convertNumber groupingUsed="false"
                                              pattern="#{bindings.InventoryGridTrans.hints.Past12SalesCount.format}"/>
                          </af:outputText>
                        </af:column>
                        <af:column sortProperty="Past12UsageCount"
                                   sortable="false"
                                   headerText="#{bindings.InventoryGridTrans.hints.Past12UsageCount.label}"
                                   id="c40"
                                   rendered="#{backingBeanScope.IndexPageBackingBean.onUsage == true and backingBeanScope.IndexPageBackingBean.onSales != true}"
                                   visible="#{backingBeanScope.IndexPageBackingBean.onUsage == true and backingBeanScope.IndexPageBackingBean.onSales != true}">
                          <af:outputText value="#{row.Past12UsageCount}"
                                         id="ot47"
                                         rendered="#{backingBeanScope.IndexPageBackingBean.onUsage == true and backingBeanScope.IndexPageBackingBean.onSales != true}"
                                         visible="#{backingBeanScope.IndexPageBackingBean.onUsage == true and backingBeanScope.IndexPageBackingBean.onSales != true}">
                            <af:convertNumber groupingUsed="false"
                                              pattern="#{bindings.InventoryGridTrans.hints.Past12UsageCount.format}"/>
                          </af:outputText>
                        </af:column>
                        </af:column>
                </af:table>

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