If anybody might need a good reassembly video, this is the best that I have found.
It's done near the camera, well-illuminated and with the right sequence. Really hope that this can help somebody, no matter what problem(s) must be solved.
--- Slidestop at 29:44.

"Spring bar" (his words),--- but it's Semi-Circular --- 29:57 its Tiny hole in the Slidestop. This narrator could give me the confidence to rebuild a gun, but even He admits that sometimes several reassemblies are required.

Wow- for the new L-shaped pin, I'll never have a drill press and drill bits.

I would simply buy another gun and keep the original for any spare parts.
----If the CZ PCR and PO1 had been designed with inwards-curving grips having the same shape (without being too thick overall), the PCR's popularity would possibly jump overnight, and few of us would bother with the 82/83s which have issues.