I tried making some up after following a thread not long ago on this topic, but it did not work for me. I used anise, vanilla, lemon, peppermint extracts. Also, I used a bit of Tiki fuel which contains citronella and lemon grass oil.
I remember some of the guys saying that they had good luck with this, so maybe I can trouble you one more time for your recipes.
I have a commercially prepared non-DEET concotion that works, but I wanted to do my own.
Thanks for riding this dead horse one more mile.