No coil over. I can't remember which way is harder now, but it's written on the dust cover.
There's a definite stop clockwise, but not sure anti clockwise - I didn't want to go to far and break something.
When I got the car the last owner gave me a pamphlet all about adjusting them - have to compress and turn, then keep turning etc then release to disengage adjuster. I had thought this was for the front but the front have the external knobs so I think it's just the rears. They have no instructions or brand, but do have 'adjustable' stamped into them. No idea how you're suppose to adjust them on-car....seems kinda stupid.
Mind you, I'd probably only worry about adjsuting the front anyway....just want a weee bit softer on public roads. Damn near broke my spine driving it last week
