Proper Thickness of Frictions

It is apart, that is a close up of a couple of discs. Fresh, but not expensive converter (forget who I finally got it from) new lines & cooler. I don’t see anything blatantly wrong. That’s why I’m asking about whether those discs are fine, or if I should spend the money on replacing them. Material came from somewhere. Maybe lock up was trying to engage and it came from there, I don’t know.
42RH trans, manual valve body. Seemed to shift fine, no noticeable slipping, though it was the first drive, everything was new noises and such, nothing to compare to as a reference.