I had a real hard time finding info to help install the Shamino 12 speed derailleur, I upgraded from the Sram NX. It was not shifting well. On my Scott Spark 960, the 2019 version uses a QR Boost system. When I first installed the Shamanio XT 12 Speed the derailleur was too far from the mark for the 51 teeth on the derailleur. Long story short I had to grind my hanger to have a lower sitting B gap screw adjustment. Without it, my B gap screw was all the way out and still not in the right position. Now it works great.