I haven’t a clue. I took them to a well renowned ‘bike man’ in my village and he set them up as best he could. He had to put the ‘non-moving’ pad so close to the disc that I think it slightly runs but he showed me that if he didn’t the moving pad really bends the disk and hence poor braking. Giant put upgraded pads on too allegedly!!!
I’ve had the same issues setting them up on my sons old Scott MTB, they’re fine when they’re actually working, however I found that I was constantly having to adjust the cables and the alignment of the caliper, they’re not great.