I think that is a QP issue full stop in the ones I've driven as they all seemed to do that to an extent. The E55K felt planted in comparison. I've not driven a QP GTS and would be keen to see if the fixed set up changes this. Maybe it is a QP Skyhook issue.
When you consider the QP5's rear wheel aligment specs are negative 1.5 degrees camber, and 4 degrees toe-out, you can imagine how the car could become unsettled in certain driving conditions. As I mentioned in another thread, I adjusted the rear camber on my car from negative 2 degrees to negative 0.6 degrees. Doing this also changed the toe-out to a toe-in of about 0.5 degrees. The car drove fine...until....we had a lot of rain the other day. When I went above 45 mph the rear would sway from side to side depending on which tire had the most grip - it was scary. I went right now and adjusted the toe-in to be "0", the car drives nice now with no issues, and the rear tires should wear more evenly now.
