[drives like jehu]

I installed the KMAC's back in April 2019- you can see my description a few posts back.
Just replaced the KMAC's with the stock bushings as I'm trying to sell the M235 to make room for the 2016 Cayman.
I got what I wanted; -1.6/-1.7 deg camber. Definitely seemed to help the track wear on the front tires.
The only bad news was they started to squeak. I didn't drive it much in the winter so probably after about 9-10 months and 7,000 miles. When removed there was rust around the bushing. Maybe I didn't use enough of the supplied lube? To re-lube them would have been a pain. Assuming you didn't get it assembled back exactly as you had it, you would need an alignment check. These bushings, obviously, alter the toe considerably.
Anyway, they did what was advertised. Just be aware of possibly needing to re-lube them.
Look for my comparison of the M235i to the Cayman. I kinda wish I was keeping the BMW...