Wah schematic questions

[juniorhifikit]

I'm making a pedal with a Wah front end, and a mosfet boost with a master volume back end - kind of inspired by the Systech overdrive that I had great fun with.  Here are two wah schematics I found on the ol' internet.  Would anyone with a bigger brain care to comment on the two?  Also, how whould I add a bandwidth control to the filter section?

Thanks!

http://www.scottgreiner.com/OldWah.jpg
http://www.scottgreiner.com/NewWah.jpg