Green bearings & sure-grip center units

If I remember right, that "button" inside the sure grip unit has to come out in order to install the axles that have been converted to Green bearings.

How do you get the button out of there?

Also, how can I tell if the axle splines are lined up before I try to install this thing in the housing?

I'm working alone, and on my back on the floor of my garage.......at age 46........I should be in Hawaii somewhere sippin' on a colorful drink with an umbrella in it, but I digress.

Thanks in advance for the help. :glasses7:

George