When I measure from the wheel center to the fender edge I am 421mm front and rear. KW says the min measurement should be 410mm front/rear before the handling/ride suffer. I have played with the damping settings a lot. I cannot easily (as I am sure you know) get to the front rebound (up top) so they are where KW set them. As for the rest, I HATED the ride when they were set the way KW set them. I literally drove 15 feet and thought I made a HUGE mistake. WAY too stiff on compression, even with my 255/55/18's. So I;

• Went full soft everywhere (except the front rebound that I could not reach), This produced a very soft ride, far softer than even stock, but very "boingy" over big dips and bumps, like on the highway.
• I gradually increased the rear rebound (up top) until the boingy'ness was match front to rear. This REALY smoothed out the ride, and made me realize a lot of the boing was becuase the front was so well controlled on the rebound (since I did not change it), and the rear was so soft and different. This alone had me about 75% to where I hoped to get. I still felt it might be a little too soft on rebound, but wanted to see if changing the compression changed that feeling.
• Next I upped the compression slowly. To my butt the compression adjustmet on these is low speed, so the car ride get stiffer/flatter quickly. It mainly effects the slow speed bumps, vs the harshness over sharp hits (this would be high speed compression).

I am pretty close to what would be "ideal" for me, and even my 70 yr old parents love the ride. They say it feels wonderful for a luxury car, and sporty. Keep in mind my mom especially has had a sport package on her cars for 20 yrs (currently driving a Audi A6 TDI w/sport package), so they love the BMW's sport/lux ride, vs and Lexus "luxury first" ride. My mechanic, who sets up race cars and street cars all the time (and who's car/driver are in the top place in the PCA Cayman GT category at the moment) suggested how to get the shocks dialed in. Ideally he said you would go full soft, then do the compression (bottom) first, once you like that then dial in the rebound, but since I cannot get to the tops of my front shocks without a lot of stuff removed seemingly, he suggested the process I did above.

Long story longer......right now I am at (rebound/compression)......6/10 front and 5/12 rear.....clicks open from fully closed. Where are you at? KW sets them at 6/5 front and 9/5 rear. My mechanic would love for me to try the KW factor settings for compression, and back the rebound the full soft. He thinks the car would smoother than I think. He believes the "WAY TOO STIFF" feeling I felt when I had them set stock was too much rebound, which meant when the car hit a bump it was stiff on the hit yes, and then never let the axles rebound. I would like to try it too, just with there was a way I could easily reach the front rebound without al the trim pieces in the engine bay!

And yes...now I need to go repost this as a new thread for search purposes, talking about eh KW install, with pictures. LOL