Steve:
"How many wires does the motor you are using have coming out of it.
A unipolar can be wired as a bipolar, but not the other way round."

This is the post that I was commenting to you on. When you wrote this you did not know that the motor in question is a 4 lead motor
at least I hope that you did not know. The statment
"A unipolar can be wired as a bipolar, but not the other way round."
Is incorrect as some but not all motors (8lead)can be connected for optimum performance both ways Terry