Rolf, re: twisting wing.

The front prt of the wing twists (elements 1 and 2) and the back part,#3, twist independandtly.

#3 is a bit floppy and has essentially stays running up inside the rig and out to some horns up by the hounds. If you ease the control line the "leech" twists off.

As for the font half, it's more complex. there is a carbon tube up the inside of the LE and it is fixed to a major rib at the hounds. above the hounds the ribs are all gfixed to the tube and turn with the tube if it turns.

Below the hounds the ribs and boom box are free to rotate about the spar. There is a control arm at the bottom which limits the twist and allows for control of twist. think of curtain rungs all free to turn on a curtain rod.

Between these two functions you cover almost all wind gradient conditions encountered, allowing for a flexible, always powered up and not stalling rig.

B