Hi Just wondering if it was possible to inherit from umbraco.MacroEngines.DynamicNodeContext to have a custom pageBaseType for razor views?

I've tried:

public abstract class MyViewPage : umbraco.MacroEngines.DynamicNodeContext
    {
        public MyHelper My { get; set; }

        public override void InitHelpers()
        {
            base.InitHelpers();
            My= new MyHelper<object>(base.ViewContext, this);
       }
    }

 <system.web.webPages.razor>
    <host factoryType="umbraco.MacroEngines.RazorUmbracoFactory, umbraco.MacroEngines" />
    <pages pageBaseType="umbraco.MacroEngines.DynamicNodeContext">
      <namespaces>
        <add namespace="Microsoft.Web.Helpers" />
        <add namespace="umbraco" />
        <add namespace="Examine" />
      </namespaces>
    </pages>
  </system.web.webPages.razor>

The base class doesn't contain a viewcontext to hook in to. I was wondering what was required to hook this up?