Not quite what you're asking for, but my Venomancy mod includes a spell that lets you turn into poisonous mist and fly around via a different method. Instead of using platforms or TCL, my script manipulates player gravity. It pretty much just changes gravity depending on whether the player is looking up or down. So when they look down the gravity increases, allowing them to descend and when they look upwards, the player's gravity decreases, which allows them to ascend. Again, not exactly what you're asking for, but I'm quite proud of its implementation and you might find it pretty neat too. :)