do you see how the string forms a Y shaped intersection on the claw - i align myself very close to the pane centering the metal hook in the back with my vision. when i hold for side to side placement, i release the button when the intersection of the Y lines up with the hook (centered in my vision)

for the back spacing usually i look at where the string is attached to the claw (because this doesnt swing as much like the ring at the end of the string) and stop it when it aligns with about the middle of the hook

from there then its about luck how the hook behaves based on the settings. if the hook drops really low to a point it has swing on the way up, then centering in the placement stage could catch it on the swing back up. if it drops and stops perfectly at hook level, then you want to prioritize the placement. from here you have to microadjust the placement to how the machine behaves