Because burning anything releases fresh spring air.

Not tracked or they changed the brake calipers. With track use the calipers will actually change color.

Well, he is correct. Also that plug looks real close to the sidewall. It doesn’t seem to be closer than .5" so a plug will work. Patching it is the better solution with replacement being the best.

RC was a stepping stone for me to get into cars, become a mechanic and eventually a road racer. The hobby grade cars have a lot of adjustments like real cars and some of it translates.