When I do twisted sonic reverse bust 12-23 it seems to me like the bust should be fl ringaround reverse (or korean ringbak) 23-23 done in the same way as pinkybak (swing it below the object finger & back to the original slot). Is this correct?

Please no discussion of what a bust is or isn't, id just like to hear what people who use this trick do & if there is a general standard.

The way you do it is right.

Twisted Sonic Bust=Twisted Sonic 23-12 -> FL IndexAround, so if you reverse each of those you get Twisted Sonic Rev 12-23 -> FL RingAround Rev.

But the ring around needs to start and end in 23 right?

Yes

ok, thank you both!