I've made a video showing how the new GUI and tools are supposed to work. The video is 14 minutes long (sorry) so I had to split it into two 7-minute halves because of the YouTube 10-minute limit.
My voice is a bit hard to hear over all the racket in the first 30 seconds of part one

but it gets easier to hear after that, cos I dive to PD and everything quiets down.
Please note this is still WIP and things may yet change before release; some things may be added, others removed.
I'm also posting a new screen so you can see the new heading tool (extreme bottom left corner of the screen) and popup toolbar (which appears in the messages box when visible) more clearly than you can see them in the video.
Cheers!
OLC
P.S. The shortcut icons (Command Room, NavMap, etc...) are by JCWolf (taken from his "Tool&Dials" mod) and will be included in my mod (thanks JC

). Also, I used JCWolf's "3D Officer Icons" in this screeny and video; however, although I do recommend them, these officer icons will
not be included in my mod (nor will any other officer icons) so that you may use whatever officer icons you wish with the GUI.
Demo Video Part 1
Demo Video Part 2