Phew! That was tricky. Had some trouble getting the tri-lobe screws out of the Touch ID assembly - they were done up real tight. Swapping it over and reinstalling in the new digitiser was a breeze.

I assembled the phone (without adhesive) first to test everything. Touch ID, camera and speaker all leapt into life, but the proximity sensor didn’t seem to work. I took the phone apart and dismantled the camera/speaker/proximity sensor assembly, cleaned the contacts, replaced the double-sided insulating tape, and reassembled it. This time I managed to seat the proximity sensor with a positive click, then everything went together easily. I trusted that this had fixed it and went ahead with adhesive installation before finally reattaching the front panel.

Thanks to the author, plus several useful comments, my iPhone 7+ is now fully operational again!

Excellent instructions which, combined with some very helpful comments, means my venerable iPhone 4 (just a backup, but needed occasionally) has a working home button. Managed to break off one of the EMI fingers in reassembly at step 21, but it still has 3, and works fine.

My only glitch was I managed to trap the antenna connector under the logic board, and didn’t notice until I came to reassemble at step 12 - which meant I had to repeat the disassembly to release the logic board and then replace it. Took around 2 hours all told, but very pleased. Thanks iFixIt.