How light is light density and extra light density compared to medium? I can't imagine one would get a hair system to look like they are still balding. Are light and extra light still providing a full head of hair? Can I still do all the styles I could do with a medium density? Medium heavy is offered, but not medium light so I'm cautious about trying a lower density. But I'm sure I probably need a lower density because I'm trying to incorporate my own natural hairline, and have a system right behind it. For sure I would need a graduated hairline. But I don't know if it would be a low enough density. Is their a limit to how much you can thin the front of a piece for it to blend with your own hair?