Steering issues.
If you are using the supplied red Mardave ball cups they are probably very stiff the only way of getting them to work properly is to crush them slightly with some pliers this either makes them work perfectly or completely knackers them. Best thing to do is get rid and use Schumacher ball studs, cups and 35mm gold turnbuckles. Perfect every time.
HiTec servo as per previous posts are not the best at re-centering therefore your you car will drift left then right - a real nightmare.
I run a Savox 1351MG in my mini stock and has had some real abuse and has not failed me yet. Only disadvantage is you have to run a 4700uf power cap to cope with the demands of the servo or it will get the jitters if you run 4cell NiMh.
Failing that just use the good old Futaba S3003, they are reliable, cheap and you wont have to run a power cap.
Hope this helps.
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