As you move from 1 step to the next you are only changing 1 winding at a time. So if it begins to move before the 4th winding is not changed, all the better! Then there is a delay of 1000x. When you come to an immediate stop, there is no changes to worry about. When you turn off the power in my code, the order could be important. I have not handled this case yet. You can choose which order to do this in. If 1-4 then it could in theory move backward. If 4-1 then maybe forward. It could not move forward if there is some torque against it. With the gear ratio of 64:1 nor will it move backwards. Even if it did move a step 1/11th degree, you're coming to a stop anyway. When you start up again it will be as if it didn't slip backwards. It should not effect torque or top speed. Agree?