Not that I had any doubts, but the tips I get here help a whole lot. I bought 3 Slot it's. The 962 c KH ran fastest on my track at 4.2.....The 962c ran 4.3... The McLaren was a little slow cause if ya over drove it, it would de-slot.....I put a small weight behind the front axle inline with the guide and ran a 4.1...NEW Track record ...and I guess.5 is a 1/2 second, not a bad improvement. I think the 962c KH has c-1 tires on it, and the others soon will.
Now it I could figure how to quiet my fly cars down some....they sound like a cement mixer next to the slot-it's.