Well I got an email from Maurizio of Slot It the other day about why the recent Rothman's 962 was so fast. The reason was that the 962 body, starting with the Hydro Aluminum car has had a "touch up" done to it. The body shed 3 grams of weight and it's now down to a light weight 20 grams. The next car to undergo a weight loss will be the Lancia, which according to many is nearly as fast as the 956 Porsche. According to Maurizio that's the standard by which the other car's are judged for speed. The new Martini Lancia will be lighter with a modified cockpit. Further, the Lancia's interior will be modified so it doesn't touch the chassis as it does in the first version, the Malardeau. After that the Sauber will be next on the Slot It weight loss diet.
All of this explains the delay in the production of some cars people have been waiting for....like the Martini Lancia.
It also does raise an interesting point though...let's say you're going to enter a race that's supposed to be "stock" slot it's. Let's say not everyone know that the newer 962 is a lighter body, or the newer interior that came with that body is lighter...you've got a nice little advantage, no? And aren't we all looking for that edge?