Fist off crc is a great 12th scale car.. they are always in a mains at every race...
for a servo. if u dont want to spend much, and want a good servo get a hitec 225mg it has great torque, power and is fast...
it sells for about 30 bucks retail... and has metal gears... i had one i ran all summer inmy 10th scale and it workwed awesome...plus ity is plenty small to...