Darnold...thanks for the info...at the last race Socko was talking about the rear tires...gray vs. pink and said the pinks scrub too much speed....since i didnt have any other tires i was stuck...i have a set of grays waiting for me though........i didnt notice the black stuff on my chassis cause its black also...but when i got home and saw that my batteries were nasty sticky.....i'll give your suggestions a try.....going to get a new car this summmer...prolly 12LS......i like having the option of 4 and 6 batt. slots.....