hummmm....

if you new never put a one way in to start, i would suggest stuffing the diffs if your building the car, i would also say and it is TOTALY up to you....

get some new shocks!, i hate the stock shocks tamiya supply, i would suggest a set of carson shocks, allu, threaded, tamiya spring set fits them and are very high spec for a very cheap affordable price..

its just an idea, you buying the following and i think in all honesty the ride of the car is important, and the ride "ride's" on the shocks!..