5. Accurately place the IFM Shim, with its inscription always facing
camera-outwards (2), onto the PL mount. The shim's screw holes
must line up exactly with the mount's thread holes and the index
pin (3):
6. Fasten the lens lock, still in position OPEN (2), back to the PL mount;
use two of the six torx screws (1) hand-tight: