Consistent Honeyhive C shortcut method?

This is a variation of a shortcut used in Yoshifan's segmented run:
• Super Mario Galaxy - 6...
This method seems at least somewhat RTA viable. Just don't hold up or spin too early--don't let Luigi touch the wall.
Recorded off of Dolphin--input display provided by Yoshifan's RAM watch scripts:
github.com/yos...