Wow Vudu, I like it! I must admit, I haven't really watched many training videos, but this shows real promise.
One small thing... I think the way you described the "room text" isn't quite correct...
It will work for communicating with anyone who's spawned from the same field as you, but not anyone who happens to be within "range" of you (unless something has changed?). Flying over GV's and typing to them on that channel will only work if they've spawned from the same field as you did. If they spawned in from a different field, it won't work.
Also, I don't believe there's a range restriction on text. They can be a long way away, and still see that "room" text.
Range "vox" is limited by range, but not limited by the field someone spawned from.