I'm guessing that the fixed cup can be left in place while I remove and replace the bearings? I have never worked on a BB with a fixed cup. Since that is what people suggested, I'm guessing it is possible to take the bearings out via the opposite side?

Yeah, I'm trying to keep this rebuild inexpensive so reusing as much as I can. Thanks for the info.

I'm hoping I'll be able to find a new seatpost, as the current one is one of those big, clunky funny sandwich clamps, but the post diameter is small and weird...like 24.0 mm.