Thanks Guys
i finally managed to set this up today following the suggestions and just have a couple of questions. I set the ATV to 4K SDR as per the vids but was only able to set Chroma to 4:2:0, is this the G3 unable to be set to the higher option? For now I have connected the ATV directly to the theatre, what I have noticed is that comparing the built in Netflix app, when I load something that is 4K, DOLBY Vision & Atmos in mentions this in the top right of the screen, when launching the same content from ATV Netflix it dosnt mention this however when pressing down on the remote the graphic displays DV & Atmos. Also what I noticed is that when viewing this content Dolby Vision picture mode is enabled, is filmmaker mode not available in DV?
Just trying to get my head around all the different modes