I took ECS for almost a year before starting lindy. And even though I don't know the the moves you mentioned above (except for tuck turn) by name, I bet I do 'em all the time. I can tell you that every single move and choreography variation we learned in ECS has been led to me in lindy dances. Good lindy leads mix up six- and eight-count moves--driven of course by the phrasing of the music. It's simple math: One can do an eight-count move and four sixes and end up back at the beginning of a 32-count phrase. Or any combinations thereof. Or even come back at the end of the second phrase. Then again, there are those who dance without any obvious or subtle connection to the phrasing of the music. That would be why I started that sentence up there about lindy leads with "Good." Also recommend you go back and read some of the posts on the evolution of the swing dances. (I don't have the time right now to find the links for you; sorry.) All of these six-count moves, all of these dances, have their roots in LH.