[AccordCE8]

It's right that the koni yellows damper can only be changed in height with the 'plate' which the spring rests on. So changing height after installation can only be done while compressing the springs while under the car with a 'compress' tool. The drop / raise height is different for each car, also the number of height positions. For mine 3 heights -15 / 0 / +15 mm , but they are also with 5 different heights and + - 30mm.
You can look at koni.com for info about ride height