I'm guessing there's been a ton of threads with this exact same topic so sorry if this is repetitive but i'm looking for advice on the riffle fan? I've learnt the method about a few hours ago but can't seem to get past a quarter of a circle, not sure if i should keep the platform finger flat so it stays on the nail or if my top hand's fingers are getting in the way or there's not enough momentum. Any advice or top tips would be greatly appriciated and will continue to practice and hopefully get it looking quite nice with some practice. Thanks