It seemed people were under the impression you had to loosen the red collars for height adjustment. Not true. You loosen the gold ring, only. And if you dont want to drop the knuckle down and spin the base of the coilover for adjustment, then yes, you can grab onto BOTH red collars at the same time, wich will spin the whole coilover assembly higher or lower in the BASE.
Some people still insist on giving false instructions/advice.