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That took a lot of practice :p I think the one you meen is the one of more than 1 minute. Had to cut it for the clip :p

Yes, that's the one. I initially was thinking it was using the programmed circle mode, but then saw it deviate into wider spiral, very nicely done. I still struggle keeping a smooth circle with working both thumbs. Lot's more practice needed for me. Love the ideas I get from watching vids like this with many different transitions.

I have that clip on my laptop, i will tag you if i put it up on YouTube :D