I'm thinking of getting some butterfly bars and mounting them with the open portion facing forward. How much of a longer stem is typically necessary to end up with a similar hand position as you had before? Also, if I'm going to go in for a professional bike fitting, I'm assuming I probably want the butterfly bars on the bike before I do the fitting? Also, my bike currently has a Ritchey stem that is adjustable for angle. Is there such a thing as a length-adjustable stem? I haven't seen one on any of my searches yet.