How do I control speed using servo.h?
I'm really just guessing here, but according to the documentation,


  "write() ... Writes a value to the servo... On a continuous rotation
  servo, this will set the speed of the servo (with 0 being full-speed
  in one direction, 180 being full speed in the other, and a value near
  90 being no movement)."


Have you tried maybe doing a myservo.write(90); which according to that documentation should be slow or stopped?