How to capture ndisplay?

Hi there, thank you for your Tutorial. Unfortunately I have been unable to render a Node/VPort with an ICVFX overlay. Only the default view-point is rendered, is there a trick to this? Also when I select a Node/Vport that is just a icvfx feed Unreal just falls over…
I am however able to see the icvfx camera overlayed on my Ndisplay screen as normal live through my Ndisplay preview?

Any tips or help would be greatly appreciated! cheers