[M-A8]

My mistake, sorry, after limp mode you will have to change coding to stock one, 55, then do calibration and when thats done you start again, thats why I said it can take 20min to over an hour.

Yes, you do both axle at the same time.

To achieve more less equal gaps (front and rear) you will need at least extra -5mm at the front as originally gap is much bigger at the front. So by going -10 and -10 you lower the car but you not canceling the gap difference.

Side effects; when lowering a car you automatically changing the camber. This will shred tyres more from inside, BUT, this will increase if you will be driving in dynamic mode at all times or majority of time, if you will have soft compound tyres, drive like a idiot in dynamic on soft compound tyres

Tyres like Dunlops are not good. I found a solution to this problem by fitting a set of Toyo Proxes T1 Sport which are a OEM equipment on S6 and RS5.
Reason why they are better, they are a dual compound tyres. Hard on the inside for better steering and soft on the outside for better grip.
Honestly, they are great tyres and the fact that they are dual compound is just

But, shredding does not take couple of months even if you drive in Dynamic.
Not so bad overall in Comfort mode.

Benefits; much stiffer car so better handling (dynamic mode), you can really feel the difference. You can't feel that much difference in Comfort which is good as you can still enjoy comfy ride on long journeys.

I've done mine something like 2.5years ago and its fine since. It took me 20-25min or so, but when I was trying to do some adjustments 6months ago it took me well over an hour to get it right.

It is very important to do this process on a dead flat surface, very important.
Also very important is calibration which you should do at least 3 times in my opinion to make sure that gap difference between left and right wheels is within 3mm or so.

If you take tape measure now and measure the distance from the center of the wheel to the bottom of the wheel arch, front left and right or rear left and right, you will notice that distance is slightly different for the left and right wheel on the same axle.

REMEMBER, always do this stuff on dead level surface, if not sure, its not silly to take a long spirit level and check the surface level all over the spot where you will be doing this mod.

Between calibrations and coding and calibration is good to take car for a short spin around the car park.

Tyre wear ( I call it shredding isn't that bad with the right set of tyres, otherwise I wouldn't have car in Dynamic for most of the time. Fast cornering, going mental on the roundabouts is more damaging.