PaulS:
The servo library prevents use of PWM on pins 11 and 12
Are you sure about that? (Pin 12 not being a PWM pin, and all that...)
Well, I could pretend that I thought that we were talking about a Mega and using between 12 and 23 motors, in which cas PWM is disabled on pins 11 and 12. However, I will own up to misreading the Servo reference page, in which case
On boards other than the Mega, the library disables analogWrite() (PWM) functionality on pins 9 and 10, whether or not there is a Servo on those pins.
So, the pins for A2output and A3output will need to be reassigned.