I had nothing else to do so I made this:
http://www.youtube.com/watch?v=1tobY0LF8Zo&feature=youtu.be
Basically this video shows some Link combos and, that it is possible to get back on the stage while using Z-air in FD.
First combo: It is very hard to achieve and, obviously, this would not be possible against someone unless your opponent does not know how to DI.
Z-air Footstool: This is actually possible to achieve without TAS. However, at 0% I would say that it is impossible and not useful at all since the only thing that can follow up is D-air.
http://www.youtube.com/watch?v=1tobY0LF8Zo&feature=youtu.be
Basically this video shows some Link combos and, that it is possible to get back on the stage while using Z-air in FD.
First combo: It is very hard to achieve and, obviously, this would not be possible against someone unless your opponent does not know how to DI.
Z-air Footstool: This is actually possible to achieve without TAS. However, at 0% I would say that it is impossible and not useful at all since the only thing that can follow up is D-air.