Terry, you'd a good job,especial to the head light.
In addition, I will apply 1 final layer as sliver colour (PS-5) then the result will be much better. Just sharing.
Servo: I'm using Savox 1251MG, GOOD, feel like S9551. It is Digital with coreless motor + Aluminum case + low profile. Most importent is below $350 @ Top speed. http://www.savoxtech.com.tw/
If budget is OK, sensor Motor set is "must" items!