IF you still have wandering problems you might check out your servo as it might not be centering right or if it is not tight on the servo mounts it could move some. Yu could also have a tight ballend or you kingpins might be a little too tight and casue a little binding. Just some more things to check.
Randman that is a nice car you have coming. Very cool looking ride. How hard is it to get parts for that thing?