ok, a quick tip for anyone else that wants to copy data to the watch.... do NOT use a USB hub, plug the phone directly into your mobo usb ports. I've been trying to copy the latest update to the watch for a while but it kept stalling for no reason. Tried adb push, same issue! Then, finally tried plugging directly into the computer and bingo, worked first time!

May just be the hubs I have, but they are d-link ones so are fairly decent.