Fairshake, I put up the directions with the pictures and these directions don't mention using the empty case. Pictures 'talk' and text sometimes is harder to follow.
I'm not sure that the directions 'are not good' because of the missing words about using an empty case to hold the ejector in place as a must way of doing it. Having a taken two '92's apart and assembled them again, several times, I found that it to be more cumbersome guiding the bolt with the case not securely held in place by the ejector.
An alternative is a thin flat piece of metal pressed against the ejector which keeps it in place the full travel along the rails
(plus the ejector collar doesn't move off the end of it either) v trying to keep the case firmly attached to the ejector the final couple of inches into battery that wobbles and falls off the ejector and the collar falls off the end also. Then again, to each his own