Unless you have a Servo mounted weight that will throw the car out of Balance, all you will do is Donuts or suffer from bad understeer in one Direction.. Placing weights doesnt work in the 1:10th Realm...

By all means try it.. I mean we have had those who claim to drift a 2WD Car and when they post a vid the most they achieve is a tail out..
We have had people put rubber upfront, Poly down back and come back saying all they could do is donuts...