With AE style front ends and steering turnbuckle length and angle, Mounting the servo flat will take ackerman out of the steering geometry when setup correctly. Angled servo mounting makes the ackerman angle right but on carpet where you have higher bite conditions, flat servo mounting makes the car easier to drive.
The CRC front end has a shorter turnbuckle and the ballstud location is different from the AE front end so i am not sure to how it would effect that front end being i have never tried it.