staring at gray balls

I have been done quite a few HDR grading/balancing/calibration or however you'd like to call it over the years. Some of them are gone with my previous hard drive failure. Just want to take a moment and gather these WIP gray/chrome ball matching renders.

Been learning a lot through these exercises and discussions with other leading professions. Kudos to them sharing knowledge with me.

Feel I am a bit obsessed on matching them.