Device capture for iPad Pro 12.9ïnch

It seems cpdevicecapture.app doesn't like iPad Pro 12.9" I can run the app without device attached or with a standard iPad or iPad Air attached and it works fine but on opening the app with iPad Pro 12.9 attached, the app just crashes.

I've replaced the device skins.xml already and noticed there is no entry in the xml for this device. So tried a few names to add an entry in trying to get this working but not sure I'm using the correct ones as app still crashes. The xml entry I'm using is below and its the value in RED that I think needs to match iPad Pro 12.9"

              <device>

                           <name>ipadair</name>

                           <resolution>1600x1200</resolution>

                           <image>ipadAir.png</image>

                           <imageWidth>1081</imageWidth>

                           <imageHeight>800</imageHeight>

        <previewWidth>600</previewWidth>

        <previewHeight>800</previewHeight>

                           <startX>30</startX>

                           <startY>30</startY>

        <recordButton>530,45</recordButton>

              </device>