I measured a depth several positions.
- About 6 centimeters near iSight Camera center, you must no use iMac opening tool, because iSight element exists.
- iMac opening tool has a 9mm radius, so it may break iSight camera element.
- Making a plastic card stacking 2 or 3 to 3mm, under the iMac opening tool, that makes inserting a gap 5~6mm like below.
@. iMac opening tool
====== plastic card3 (credit card 1mm)
====== plastic card2 (1mm)
====== platic card1. (1mm)
———————————————— isight camera element (total 5~6cm) ————
In my case, i got a display problem where lcd display yellow connector was torn without care.