Savox 1251/1252 have really weak gears, avoid them in any car with out a servo saver. They were designed for touring cars, but they break them in those too.
I'd suggest you want a servo with at least a 12kg/cm torque rating. XpertRC low profile I use, Sanwa and KO are always good too. It's possible to fit a full profile servo, just tight. see pics of Lee Martins car with full sized XpertRC.
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