I'm trying to learn this -
as it fits perfectly on the end of one of the combos i do.
I'm having absolutely no success. The tama always comes off before it's spun even halfway round, i think my technique must be totally off.
Tried to find some decent tutorials but I can't. I'm not even sure if it's called a finger spin as when i youtube that i get tutorials for a totally different trick

Can anyone give me any tips? The way i've been doing it is trying to give it a bit of upwards push to "loft" it and then spin. Like for turnovers, so the tama stays in the cup. But the videos seem to do the opposite, like they're lowering the whole thing while they do it.
also, would it be easier to do this with a new kendama, that's still all smooth and wooden, or my beautiful broken in bamboo one, which has a layer of oil and crud on it now?