Hello Chaz Cerone
I understand what you are describing with the pump shaft assembly being hard to remove and a bit un nerving the first time taking it apart, many people, myself included has been in the same situation as you are in with the removal process. It takes some getting used to and considerable pressure to get the assembly to start moving.
Make sure that you follow the instructions on the video and ensure that you are not side loading the ceramic shaft during this process as it will break. Keeping it straight as you can and using enough force to get the assembly moving outward is not going to cause damage if done properly.
I cannot stress enough the part about side loading the shaft in any way and ensuring you are trying to remove the proper side as one side of the motor block bushing cage does NOT come out the housing.
The Techs here use a screw driver handle with a good flat surface, place the motor block on top of the handle and use this to help push the assembly out, it is very tight tolerances but will come out.
When installing the assembly using a socket that fits the size of the bushing cage, tall enough to allow the shaft to stay protected and tap lightly with a small mallet to seat the bushing cage. Deep sockets work well for this part.
Please let me know if I can help you any further in this matter.
Sincerely Michael