The flight safety regulations ensured that the actuator would have to perform to within just one degree of accuracy of rotation and qualify to the stringent DO178 and DO254 software and hardware requirements respectively. The only available installation space would have to be within the skin of the existing wing profile leaving room for only 1mm of clearance.
For the installation to be a success, the desired power output would demand exceptional performance from a unit that would be so limited by size and weight.