cut out all the springs , then find two small grub screws labelled l+r or high + low take these out , go to a diy shop bolt place or similar and get some long ones
put these in and screw them in until they are both touching the metal piece in the way of them (you'll see what you do it ) , thus the mech is unable to move side to side
then tweak till youve got good chainline , ziptie to chainstay
and your off