I've got a rather old iMac. Even though it has screws on the back, you replace the drive (which I just did) by going through the front -- step one, attach suct

I've got a rather old iMac. Even though it has screws on the back, you replace the drive (which I just did) by going through the front -- step one, attach suction cups and remove the screen. (Shout-out to iFixit for their informative guides.) You've confirmed this truly not user-servicable? (edited typo)