To answer your question, yes I do.
I've replaced one of my fav vendor flavs via DIY. As others have mentioned, head on over to the DIY forum. If ya poke around a lil', you'll find my recipe for my Iffy Peach (IP). Or PM me and I'll send it to ya.
Unfortunately, thus far I'm not totally pleased with my coconut and strawberry efforts... yet. BUT, I'm $aving a wad with just the IP!
