Re: getting springs reset
Depends how long you keep the car. Long term no short term yes. They will fatigue much faster and have a high chance of one side sagging more than the other. Suspension travel obviously is lower so Bottoms out much easier as well.
In hindsight I did this to one of my cars years ago and had no uneven heights but it did bottom out harshly as time went by.
If you are keeping the car for a long time get new coils.
'02 XR8 S111 220kw + a little more