Quote Originally Posted by akusuma View Post
I thought some of koni yellows (like for eg/ek) are height adjustable as well by changing the position of the perch
Thats what I'm saying, but the range of adjustment isn't all that great with the standard perch (lower spring seat) height options. The perch is located by a clip that fits into your choice of a number of circumferential grooves (three is typical, but some 'Yellows' have more I understand), and the number of grooves can be easily increased by machining extra ones.

I would be cautious just how low you drop though, the standard Konis aren't designed for 'slamming'! For that you need a damper with a shorter body length, or very stiff springs to prevent bottoming out.