https://youtu.be/DQl8bhZe0uU
I must say that I am very pleased with the servo speed. I limited the range on my flysky, and everything works great. Plenty of torque in that little servo.
edit:
Although this works, I really don't like how it looks. I think I'll go with the 2 servo option. It will look much cleaner, and it will alleviate the need for a big slot on the front of the dozer for the arm to move...