I wish I saw this comment earlier because it's absolutely correct. I hope iFixit remedies this because it is incredibly difficult to connect the sensor when it's already adhered to the glass. It took me a good while and I ended up using some tape to keep the back glass aligned while I used the spudger to push blindly until it snapped into place. The only way I knew it worked was because I tested the sensor before fully sealing the glass.

I found it impossible to remove the camera without removing the motherboard. It wasn't a huge issue to do so, but no matter how I lifted/pulled, it seemed the motherboard was always in the way. Once I took that out the camera popped out quite easily.