For sure Brian is correct with regards to not using the splines to get the wheel centered... however, isn't this supposed to be done at the tie rods when an alignment is done?
If you turn one adjuster ( the rod between the inner and outer tie rod ) ( after loosening the lock bolts ) one direction and the other the other direction... that changes the alignment at the steering wheel.... I think...

Also, you need to check the drift on a flat surface like a parking lot.. the crown in a road will cause it to go left if set up exactly neutral on the car...