I've done this on a few kites. It seems to work better on the newer weighted kites.
Basically, you do an accelerating multi-barrel roll. As the kite spins faster and faster, the barrel roll converts into a backspin (spine around 30° downward) and the kite starts rising.
Don't know if we've discussed this before.
I'm sure many of you have done the "Rising Tornado", but it was new to me.