**odf**,

Quote - One thing to look out for a deformations of the chin and jaw. We don't want rubber bones.

Here is a view from below of the old and new head twist superimposed. Both neck and head are included. The head has a twist of 45°. As you can see the chin and jaw seem to be nicely excluded. The twist does extend rather far up the back of the head, and whilst this may be anatomically incorrect, visually it looks better to my eye than the old twist.

Neither the old or new twist play well in combination with head bend or side-side, but I think over all that the new one plays better in most respects.

I have to go out shortly, and may not be too sober when I get back. I will try to post the actual twist channel tomorrow.