About to take another stab at replacing the laser unit on my original PlayStation from 1996. This time, the mechanism is pre-tuned and pre-aligned. It cost twice as much, but apparently it should be drop in and go.
@blakespot Had reading problems on a Xbox 360 a long time ago, turned out putting a heavy book on top made it read discs again. Other than that, cleaning the glass always worked, but then this is its own beast.