Pulling is easy compared to pressing. They have to be in the exact tooth and all lined up. No to mention the 90 degree offset on each side.The wheel cups would make it easier. I just stacked washers.
It would be cheeper to buy a battery puller and grind the tip flat drill a hole and insert a hard pin or nail. After use I had haf to file away the soft spots.
The thing to remember is no to mar the wheel. It is hard not to so it with thic model because it is loose. The factory model is more and probably worth it.