I banged my controller and had an issue where my left bumper/trigger wouldn't press down properly. I used this guide to disassemble my controller, and found that the thinner part of plastic that holds in the T8 torx screw to the bottom plate next to the left trigger broke off and was wedged between the bumper and the PCB. Since I removed that tiny little hunk of plastic, my bumper works perfectly.

The only issue is that the top plate doesn't sit flush with the side plate and to a lesser extent, the side plate doesn't sit flush with the bottom on the left side since the torx screw only touches the half of the backplate toward the center of the controller, but this is superficial and not worth buying a new backplate. I've very grateful for this well constructed guide!

It’s possible the screen cable wasn’t seated properly. You could remove the back panel and reseat the cable. You can test whether it works without adding the rear panel.

I did this directions fully. It took me closer to 3 hours. This was my third screen replacement after my Pixel 1 and Nexus 5. Everything works great! The only issue is that there is about a 1mm gap between the screen and the frame at the bottom. I bought the ifixit screen kit, but the screen tape included just had nothing for the bottom, so I wonder if I did something wrong. Generally though, the screen and back cover both stick out which makes it uncomfortable to hold because those sharp edges dig into my finger pads as I hold it. I thought i did enough to remove the leftover old glue, but it seems there was still enough to cause a gap. It would be nice to include tips or links on how to best remove glue to reduce the chances of this.

The hardest part was warming the glue enough to remove the screen and rear cover. I had to use my Heaterizer XL-3000 Heat Gun to fully remove it- the iOpener wasn’t enough, but it did help to warm up the phone and limit use of the hot air gun, which is always scary.