Tinctures were used to make per bottle variants. Bottles marked with the type of tincture and the amount of drops. I wasn't too scientific about it, just made variants randomly on about half the batch. Personally I liked the mangoe tincture and the bottles spiked with mezcal.
I also tried a cherry tincture which was interesting but not dosed right. The biggest problem with vodka tinctures overall is that you get the alcohol taste from the vodka come through as well, so at higher amounts they taste boozey by association, not a good balance to the flavour. In future I plan to try purpose made flavourings for food industry.
I'm on the lookout for other ways to add variation to a small batch of beer.
Recipe: "XPA - The Usual Hop-Specs - BZ35L" on brewfather (I used all galaxy, no sabro)
From most to least expensive:
Robot vacuum with autoempty station. Scheduled to run over different areas of the house at the right times. We have pets so this is major. Bit fiddly to automate so that it doesn't clog itself on pet hair, but I figured out a good rhythm now.
Smart bulbs in some rooms, automated to dim at night and turn off in morning.
External sensor lights around the house and garage. And internal sensor lights in pantry and deep closet space.
They are small things that you feel the benefit pretty much daily.