Actually, another questions is what are you using the car for and what are your budget?
Depending on what you are doing, we do have the ZetaCRD+ as well as the GT1.
The older Zeta-R don't have the slotted hole, the ZetaCRD+ does.
I am sure if you want you can slot the hole more, but you don't really want a really long elongated slot.
After all, for every one person trying to get -4 degree of camber, there is going to be three person looking only for -1.5 degree.
I haven't had anyone mention to me with issue regarding negative camber.
But the DC5 alignment are linked so it will depend on ride height, camber, and toe.
Warranty wise the ZetaCRD carry one year.
And if your budget can stretch the GT1 have a lifetime warranty on hydraulic function of the damper "at the moment".
It is at the moment as we are expending in USA so we are tightening up the terms, but until that happen all original purchaser get this "lifetime warranty"
Unless something is physically damage, the GT1 dampers are designed not to fail due to the in house made CNC internal and seals.
Just a few thought for you, any questions just let me know.
Jerrick