I would like to make a few points about car grip, the grip levels offered by Scalextric cars has gone up massively in the 50 years that I have raced. The change to the Sport track and combined with the magnatraction cars has made Scalextric a superb home slot car system. For a few years I raced on 1/32 scale permanent hard tracks, I learned the importance of preparation during that racing. All slot cars are sensitive to grip and what seems like a nice clean track can be quite dusty, the car then picks up the dust on the rear tyres which has a very detrimental effect upon grip. I clean the track with a painters tack rag or car body panel wipe on a lint free cloth, I then clean the tyres, either by revving up on some 180 grit paper or doing a solvent wipe on the tyres. Pay attention to the braids, I like to tease the end of the braids out with a pin to start with (a little lube like GT 85 helps the braid tease out) and then us a very small wire brush to really get the little bits of wire in the braid all heading in the same lay pattern, I then put a couple of tiny drops of oil on the braid. Paying attention to the above can easily turn a 3 second lap time driven really well into a 2.25 second lap. The differences in performance from one style of car to another could be down to many things but on the 1/32 cars on the hard track we would spend a lot of time fiddling around with small weights to assist car balance. Some Scalextric cars are going to be better in this respect than others and will carry a more advantageous weight distribution. Slot cars are sensitive !!