If you aren’t familiar with Narsil, you should check out this post in the thread about the BLF Q8, another brainchild of TheMiller that will use this awesome UI developed by TomE.
TomE has a couple of videos demo’ing Narsil as well.
I’m not sure it will behave exactly as it does for the Q8, but I assume most information will apply.
You might as well get on the list for the Q8 while you’re over there reading! 