I kinda discovered that when I was first learning sq-1 and trying to visualize the moves by doing it on 3x3I noticed speedcubedb added cases for all slots which is cool to see. For ultra completeness, they should have every possible slot to insert in and slot free.
also what do you guys think of this
not sure it's faster than triple sexy or triple inverse sexy. it's 7 moves but 4 of the moves are double turns