I've read the whole thread months ago. I stand by my assertion. A dodgy batch is very unlikely, and if you look at how the mech works then you can see that it would need to be completely different to start doing damage.
I think most likely is that the discs were already scratched since even brand new discs can show marks. Or they have been careless inserting the disc and scraped it on the edge of the slot.
I probably would not buy another slot loader either but only because I find it more awkward to use than a drawer, especially in low light.
One of the advantages of CD is that it is fairly robust in any case, especially compared to vinyl where you are slightly damaging the disc every time you play it. What does that do for OCD?
Current Lash Up:
TEAC VRDS 701T > Sony TAE1000ESD > Krell KSA50S > JM Labs Focal Electra 926.