I'm just starting out, and I've watched plenty of videos and read tutorials, but I can't seem to make any significant difference. I've sanded tires, polished axles, dry lubed, upgraded wheels and axles, and added weight, and it all seems to be a waste of time. I have been trying to take slow cars and make them fast. I didn't want to ruin an already fast car, but I'm only seeing minute changes. The cars are a little faster, but still not as fast as a good stocker. So, I guess my question is this, am I looking at things wrong? Should I have started out with a fast car because no matter what I do, I'm only going to see very small changes, or am I just not proficient enough yet to make a slow car fast?