If I did remove the cover plate I'd use the specialist lubricating contact cleaner though, rather than air.
Awesome work! How exactly do you do the blip charging?
Has it now successfully charged/depleted a few times? What's the life like?
Looks like my left Quest Pro controller is getting stick drift. This was a cheap replacement for my original that developed stick drift. I really need to find someone who is comfortable about doing a stick replacement because, frankly, I would just botch it!