[Tinker51]

You have to buy the alignment tool. I don't remember what it cost but it is not very much. It is just a round disc with the bolt pattern drilled into it.
It sounds to me like you are getting the same problem I had with my new wheel. It was close but would not go over the pins. As I said, it took a few tries with the alignment tool to get the pins set for the new wheel but it does work. You might try the hammer trick.