Steam VR spectactor view looks warped

[Ham4tw 2]

Hi,

I was wondering if there was a way to adjust the VR screen view (for streaming to Twitch/YouTube) as the default mode looks a little distored, with a black circle arround it. I've tried cropping it in OBS and it just doesn't look good.  I can launch the SteamVR spectator view which looks perfect, but it's not quite as smooth as the games rendered spectator view, and I would like to avoid rendering two spectator views if possible, to save on PC resources. 

Thanks,

Ham