Ryota Ogi speed combo

Are there any tips for the move at 3:15 on this combo https://www.youtube.com/watch?v=nDSOaPlp-FE

make sure you push all the string segments whith your NTH pointer finger, took me a few tries to understand it as well, this is probably the part of the combo that will require the most work since it is where you tend to lose most of your spin power

my TH pointer finger always catches the string