Bowdabra has a tutorial that is free. http://bowdabrablog.com/2011/07/19/f...-instructions/
I don't use a bowdabra thingy, lol, but I was able to figure it out without it. My bows didn't come out very full tho.
I just bought the loopyforbows tutorial lastnight, and I LOVE IT! My hairbows that I made lastnight came out VERY full & fluffy! The tutorial is easy to follow! It is definitely worth the money! http://www.loopyforbows.com/p/loopy-bow-e-book.html