And (PastryGirl), I think those Zoot Rocks are really well done. They make great edibles in general, but the Zoot Rocks in particular are consistently good - something rare in our industry.
My experience with flavors in oil base is that they only work if they are sufficiently concentrated (I haven't found any yet that are). I just did a batch with an oil based flavoring that comprised 2% of the total weight. The batch turned out greasy and sloppy. So the threshold is definitely less than 2%. I'm guessing if you could reach the depth of flavor you needed with < 1% of the weight it may work, but not ideal either.
Citrus essential oils did work, I always used them in conjunction with other flavors. I found that using just citrus oils left a sharp burn on my tongue if I used only them for the flavoring.
