It's a shame you're going back to lowered springs. I've had no such issues with my KW V1's. In fact they ride better than the S-Line (quattro GmbH) suspension.
It's important to know you will always be able to lower the front more than the back simply because of the length of the struts vs the platforms on the rear springs. Set the rear first and adjust the fronts to match.
If you go to KW's website you can download their instructions which give the MAX and MIN distances between wheel arch and hub centre. Important if you don't want to destroy the suspension geometry!!
BUB