Ok, first of all let’s talk about the quality of the results.
About the note that the car when pictured could have taken some amount of roll. Arent the suspension setup so stiff in roll that the total roll gradient would be very small? I am guessing .1 deg/g? So the kinematic suspension change in roll would also be very small.
The same goes for bump because F1 suspensions are quite hard otherwise it would not be possible to run as close to the ground as we have seen it in Singapore for example.
Of course the results are not 100% accurate but I expect the tolerances to be quite small.
The roll center and the instantaneous center are moving anyways a bit.
They should not move too far for a well designed car as far as I know.
I guess the tolerances will be similar to the RC, IC movement so it is not so important what driving condition we have.
We just imagine a failure based circle around our result and we will know in which area the point is lying.
The real problem lies in the photos. They might be taken at some angle. The better pictures we have the better our results will be.
Ah by the way, dont get disturbet by the rest of the car on the pic. Especially not by the nose. We cut the picture in a layer lying on the suspension.