Exactly, the torx goes in tight against the torsion bar locking it against the offset washer. so therefore the torsion bar can now no longer move. so why would you need an adjuster on the other side if the bar is already locked against the washer ?
Am I missing something?
Ahh so if the left torsion bar goes in, the screw adjusts the clearance of the right hand side trailing arm?
Am I missing something?

Ahh so if the left torsion bar goes in, the screw adjusts the clearance of the right hand side trailing arm?