Really kinda pointless if you've ever spent 20 minutes seriously studying typical residential entry lock hardware.
Wifey B: Not something I'm going to spend 20 minutes studying.
Just teasing and while the pro doesn't need the key, maybe some might. My point was I still wouldn't publish that information in a forum. Oh, and our home, we don't use keys.
I've seen professional locksmiths do some incredible stuff so know the capabilities.