Thank you. Thank you again. And they can be done as forward ochos with lead facing LOD or back ochos with lead's back to the LOD. Think underarm turn as an example. Certainly can progress. The follow "jumps" into a seated position on the lead. Personally, I do lump those into stage tango, never lead them 'cause I think they look silly, but you certainly can be progressing through the sentada. No argument. But I still think that the primary differences are in technique, not moves/steps. For example, I think of the "inertia" based back boleo I described before as "nuevo", but the conventional, momentum based, back boleo as not "nuevo". Difference to me is significant differences in follower's technique (as well as leaders).