I think the issue here is that the motor doesn't want to remain in-between steps and falls back into the 'true' full step, which is why it doesn't move at all and jumps two micro-steps at a time. I need this to move a step / microstep and remain in that position for a long time, including down-time when not powered up, I simply cannot have it miss steps or jump steps.

Regards,
dsc.