[fatduck]

and what i meant by

_WingTipL
_NavLight0

is that thos are hooks. A hook is something like where the wingsmoke comes out, or where a nav light attaches to. Landing lights too. It also is for cannons and guns. Bomb attachment places, booster engines and a few other things.

What I really want to know is:
Are these (_WingTipL and _NavLight0) external link to other mesh?
Have you ever change it to get another look?

And what does mean?