Turns out my current burner TS-H552B is very bad at burning most media (duh!). When I started reading here yesterday I was largely oblivious to this, but once I scanned a few discs I was pretty mad.
Anyway, long story short, I have now ordered a BenQ DW1650 and pondering getting a bunch of mcc004 verbatims.
I now have a couple of fun weeks ahead of me reburning my 2-300 soon to be unreadable discs (example attached).
Weird thing is they read perfectly on my drives, so I had 0 warning until scanning.