sorry but what is a 'roll centre adjuster' ? i am curious as i have replaced the springs and shockers on my ra28 (KYB's are good), but i have no aftermarket sway bars or extra gear apart from these. I want a front sway bar at least, to concentrate weight onto the back wheels for when i go 18RG aswell. does this sound right? or do i need to go all out or have at least front&rear new swaybars?..