I was browsing through a thread on TS-H552 in a Chinese forum and found that they can use CD Speed with their TS-H552U with the CH firmwares. But the most interesting thing is they can also use the latest CD Speed V.4 (in Chinese) in the TS-H552U with US06 fw. I tried many versions in my drive and only the 3.12 version works. Anyone has experience using CD Speed in their TS-H552U?
PS.: I mean the Quality Test in CD Speed