Tetris set and TittIS set
I named Tetris a 2-step machine with Floating Titti and Reverse Inside Star (RIS). The Tetris Quadruplet has Tetris, Rewind Tetris, Reverse Tetris and Rewind Reverse Tetris.
The Reverse Tetris and the Rewind Reverse Tetris are 2-step machines with Reverse Floating Titti and Inside Star. I had originally named one of them incorrectly, as seen in the video, I updated the description.
Reverse Tetris:
The similar TittIS machine has Floating Titti and Inside Star (IS). The TittIS and the Rewind TittIS form a Rewind Doublet. The Reverse TittIS and the Rewind Reverse TittIS have Reverse Floating Titti and Reverse Inside Star.
TittIS:
Reverse TittIS
Rewind Reverse TittIS