Continuation of BigLobe Plarail Museum

Wasn't this platform or some variation of it, also available in other sets?

Yes, the already known phantom gem Chinese Plarail Sets and as single items. This station is known as Shanghai Station, and has terrible colour combinations like other Chinese Red Arrow and Kintetsu Vista Car.


 

90 degree dark grey tracks

Those are not the same mold. The 90 degree curves have different colours: red, yellow, blue. I have red so far.