One thing to mention, about Mr Rock is he has been wrong about what he remembers when it comes to his records. WHAT???? You say?? Yes, when he had that Skype interview with Friedman on tone talk last year or whenever, he was asked about what speakers Sykes used on the 1987 album. He said V30s. Well, no V30 cabs existed in 1985/86 when they recorded it. The Marshall Vintage was first used in some 1x12 combos in 1986; but not in any 412s until the Jubilee cabs in 1987. Then continued in 88/89 in 800 cabs. So, unless you want to believe that someone bought 4 combos, and took the speakers out and loaded them up in a cab he's wrong about that memory. And, Sykes wasn't endorsed by Marshall at that time so I seriously doubt with all the other cabs he owned, plus probably getting his own C+ and III Coliseums + Mesa Cabs that he somehow thought he needed to pirate a bunch of 1X12 Marshall combos for their speakers.
Then, when you consider the 2C+ and III look practically identical in 99% to each other, it's pretty easy to see him getting confused.
Let's also not forget, that Metallica used the C+ exclusively through a Marshall power section for AJFA and MOP. So, saying that the C+ is barely used on ANY albums is pretty ludicrous when the biggest Metal band EVAR used it on 2 out of 3 of their biggest Albums, and in my and most others opinions yes it absolutely was used on the Black album so 3/3 albums. Along with a bunch of other amps.