Great stuff man, we are a few here who are trying to solve this...Every little clue will add up to the big picture. I am still pondering about resizing the "Navtools" at the mo. Getting there but I can't figure the position after they are scaled.
http://www.subsim.com/radioroom/show...355#post490355
I also tried to implement this but don't seem to work on the "NavTools"
http://www.subsim.com/radioroom/showthread.php?t=108917