"Hi to All,
Been talking to a past well known dance competitor and he recalled having lessons with the 'greats' One coach told him when using CBM - as for 1-3 of the Nat - the body turns at the same time as the moving leg is going forward.
Another well respected past champion, said that the body is only turned when the weight is received onto the front leg. So that step 1 is taken with a slight right side lead.
Anyone else know of this?"
There are some differences of execution between different teachers.
But the biggest thing to look at: the body is not a monolith, it has various parts. To say when the body turns is not statement that can be precise when you are trying to describe what happens at each point during the action of a CBM step - you have to talk about the turn of each part of the body.
Or as its more commonly done in lessons, give relative corrections when one body part is getting ahead or behind in the rotation from where it should be.
Ultimately, the need is to create a turn, but not get trapped by it (turn too much too soon) in such a way that your energy can no longer be directed towards the high point of your swing. And in our customary offset hold, the implications of that for natural and reverse turns are very different.