R – How to update SPItemEventReceiver assembly version for a list in SharePoint

We have an SPItemEventReceiver compiled into its own assembly.

We are using STSDev to package up a SharePoint solution with this EventReceiver as a feature. I am not assigning the SPItemEventReceiver to a specific ListTemplateId within the elements.xml, but am instead linking a ReceiverAssembly in the feature.xml and programmaticaly assigning the SPItemEventReceiver to multiple SPList items.

    public override void FeatureActivated(SPFeatureReceiverProperties properties)
    {
        foreach (SPWeb web in site.AllWebs)
        {
            SPListCollection webListCollection = web.Lists;

            foreach (SPList myList in webListCollection)
            {
                if (myList.Title == "Lab Reports")
                {
                    SPEventReceiverDefinitionCollection receivers = myList.EventReceivers;
                    SPEventReceiverDefinition receiver = receivers.Add();
                    receiver.Name = "PostUpdateLabReport";
                    receiver.Assembly = "LabReportEventHandlers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=1111111111111";
                    receiver.Class = "LabReportEventHandlers.LabReportsHandler";
                    receiver.Type = SPEventReceiverType.ItemUpdated;
                    receiver.Update();
                    break;
                }
            }

            web.Dispose();
        }
    }

I am using FeatureDeactivating to do the reverse of the above code, removing the EventReceiver from the lists.

Question:

How should I handle the future event where LabReportEventHandlers is updated and the version changes?

These are the options I can think of:

1. Deactivate / Reactivate feature — I would wrap the updated dll back into the SharePoint solution file, change my code above to reflect the new version, and use stsadmin to upgrade the solution. I would then deactivate/ reactivate the feature.

2. Add Assembly redirection to the web.config.

3. Don't bump the LabReportEventHandlers version number.

Is there something in changing the solution version that will help me?

I think there are problems with the 3 options:

1. After deactivation of the feature, someone could update an item before I can reactiave.

2. I would not want to edit the web.config by hand, so I would use the sharepoint API instead. Where would I run that code?

3. This is just plain wrong, but easy.