I've caught it after three rotations of the stick and diabolo, but I'm not sure more than that is likely to happen for me soon.
There's a different variation I've caught a couple of times - while doing the single version of the trick, I do an anticlockwise suicide with the other diabolo, aiming to catch it back where it started, then catch and unwrap the first one.
Yikes! I'm confused. I'd like to see that on video!