How to add a report based on an object collection into XAF

I really need clear step by step instructions on how to do this.
I have looked back through the posts I have made in the last few weeks but I am coding in circles.

I wrote myself some long instructions in the comments at
https://www.devexpress.com/Support/Center/Question/Details/T317718

but they are failing me.

I noted that I need to use the report designer to set the bindingsource.datasource property to the business object that I want to report on.

I looked up a report that I had got working but the object is no longer visible in the  report designer ( when I click the menu in the top left corner of the designer )

In the designer code I see that the correct binding is set  however I should not have to edit generated code to get my new report.

[Update]
Here is the structure of my business object

C#
public class SPResultString  
    {  
        public string Result { get; set; }  
    }  

Here is my Reports dbContext

C#
    public class ReportsDB : jtDbContext  
    {  
        public IList<SPResultString> CancelOrders()  
        {  
            return GetSpResults("aaCancelTestOrders");  // returns 1 record  
        }  
// etc  

I have made the ReportDataV2_ListView accessible via a navigation item in my project and run the report from an action in a controller.
Here is my Action method

C#
private void actRunReport_Execute(object sender, SimpleActionExecuteEventArgs e)  
    {  
        var report = (ReportDataV2)e.CurrentObject;  
        if (report == null)  
        {  
            return;  
        }  
        using (var db = new ReportsDB())  
        {  
            if (report.PredefinedReportType.Name.Contains("ClearTestOrders"))  
            {  
                var rep = new ClearTestOrders();  
                var xtraRep = (XtraReport)rep;  
                xtraRep.DataSource = db.CancelOrders();  
                xtraRep.ShowPreviewDialog();  
            }  
        }  
        // etc.  

Here is me trying to figure out what options to put in.
I cant work out how to add SPResultString as the bound field

http://screencast.com/t/4saVVuks5