TRW ps pump question

Hope I got the pics in the right order.
1st pic is shaft with rotor attached. Rotor and vanes simply slide onto shaft. Vanes(4 of) are spring loaded and have 2 springs per vane. So reinstalling is a bit of a pain. Used zipties to hold vanes and springs in rotor. You can see in 2nd pic the brass/bronze?? bushing where the rotor end of the shaft rides. 5th pic shows rotor installed. Last pic shows the part with needle bearing and lip seal. It also has on oring on the outer perimeter. It gets pressed into pump housing with shaft helping to guide it on.
Essentially if you remove reservoir and look at back of pump you will see the shaft and the brass/bronze bushing.
Hope that helps. Loads more pics lol
Still trying to understand the internal design, sorry. I liked your photos of main shaft and front support with bearing and seal. But picture of the main shaft shows some type of support on the back side, on the other side of the vanes. Something must support the other end of the shaft- what is it? Thanks- I'm a dummy.

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