Bennett,
I use the proper Nissan pressing tools mate.
I bought most of the tools and what I don't have I borrow from Nissan.
I also bought the proper Nissan press tool for replacing the front compression arm bushes as well, as it is so much easier and you get a far more professional finish to the job as well.
I use similar bushes to what Adam at Z1 sells.
I am also fortunate that I have a 30 ton industrial hydraulic press in the corner of the garage.
Alex.