Honestly, I've seen the video. I have no way to review the actual in-game replay. But I have seen the 2 kph speed drop and to my eyes, as well as to nearly everybody else's, it coincides with the point of closest approach to the wall. Close enough, in fact, that it could well be a touch without any imagination.
Nobody is accusing you of not checking the replay, Rico, or even of trying to get away with anything. The fact that you indicated to me that you didn't want to use your fastest run shows me that you were trying to be careful.
But I have to go with the evidence I see and that evidence shows me that there is a touch, however slight. Believe me, I would love to have a way to accomodate you. I've resisted as many DQs as I can because I want this series won on course and not in the tech shed. But the rules were set by public review and the replay has been reviewed by public review. That was backed up with my own viewing of it in the only way I can.
I tried, in the initial draft of the rules, to have a penalty clause so that hot laps could accept such extremely minor brushes. But this was solidly voted down in the discussions that followed. The initial draft rules thread is still around; go look for it. Popular opinion stated that hot laps should be entirely clean, with the exception of Max's comments. I was more successful in having the penalties allowed for multi-lap and AI races.
Now, in the event, people are complaining and suggesting that we should have a penalty system... I now understand why nobody ever does this twice.