I love experimenting too. I keep a running list in Excel with what I have in each tank and then when I add stuff I add it to the list as flavor 2, flavor 3, etc. I also have a clean area on the desk in front of me that I use to temporarily sit the flavors I'm currently playing with so I know what I just picked up and put back down. Maybe you could try one or both of those methods? Neither technique helps much with ratios, but at least it narrows it down.