Used CL5+ without any squeal, when I first put them on I also changed Discs, also full bedding in, seemed to remember the process involved 100mph down to 30 sort something like that, always tricky unless you have a price road somewhere
I found they tended to eat discs though.
So weird.
I've got new discs now too that I fitted yesterday test drove and everything seemed okay. But drove to work today and they now squeal like a pig the same as my old discs.
Did you fit any anti rattle pads/buffers or did you just fit them as they came out of the box? Did you copper grease the backs??