Interesting, makes me want to go down that rabbit hole again.
Did you try the world famous WD40 drip system from @RichCournoyer ? I have it on my list of things to try someday.
Did you get a chance to measure how quiet that Bambi BB-8 compressor is ? I have had the same experience as you with a “super quiet” compressor, which is now collecting dust in my garage. It was quietER, but still unbearable for long jobs. I ended up using an airbrush compressor, which is very quiet but a) was never intended to be on 100% of the time, so it does get hot (no failure so far), and b) produces an air flow that is barely good enough for my use. I’ll have to try one of these MQL setups instead someday.