I skipped the majority of the steps and it was much easier. Don't unplug the battery. Don't disconnect all of the ribbon connectors. Wear rubber gloves and use plastic tools. You can unscrew everything skipping all the disconnect steps. The only ribbon connector you'll need to disconnect is the joystick itself. Much less chance of breaking connectors. I did this for 2 pairs of joycons with no problems and no fuss.

I skipped the majority of the steps and it was much easier. Don't unplug the battery. Don't disconnect all of the ribbon connectors. Wear rubber gloves and use plastic tools. You can unscrew everything skipping all the disconnect steps. Unscrew the one screw for the plus/minus board switch so you can access the final joystick screw. The only ribbon connector you'll need to disconnect is the joystick itself. Much less chance of breaking connectors. I did this for 2 pairs of joycons with no problems and no fuss.