Interesting, this is being done in room temperature too. I suppose a few things I can conclude from this saga:

1. The synthesis process is much more complex than the original paper suggests. Every group except the original is unable to create a large piece of sufficient purity.

2. It seems like even with a pure sample, the entire structure might not be superconducting which leads it to tilt on one edge instead of completely floating. (Some call it a 1D superconductor, I’m a bit out of my depth here)

Should expect all these things to improve soon, but seems like a genuine breakthrough, not a fake or a dud’