Is loving this!! both the typeface and the icon! you should try out combining it with the gas-mask idea, maybe by making the bottom circle slightly larger, maybe adding some kind of pattern to the top two.
*Just throwing ideas out*
edit: also, this is perhaps stuff you have already concidered doing in ai but I'd kern it more together, especially the f-e and the k-t. the extender from the K seems to slash the stem of the t pretty nicely, cut it abit shorter and you can slide it under there
