Just ran mine for first time all i can say is its worth every penny!! all i did is put softer avid springs on the rear this car has more steering than any rc car i have ever owned in 25 years i let one of the fast guys AE at our track take the wheel he had it flying around the track after a couple laps!! i still need a little more rear traction he said to try 3.5 in the rear i think stock is 3 i broke a rear hub carrier right before i left i thought i was out for a while but lhs had a o degrees aluminum in stock lucky me already got it on ready to race tomorrow!!