It would be good to have the Thunderslots run but they are so much faster. I don’t know what amount of weight you would have to add to them to keep them in check with the Slot.it’s or others. but here is what the weights look like.
Carrera CanAm slot cars – 88 grams to 92 grams
Thunderslot cars – 63 grams
Slot.it McLaren – 63 grams