Hey guys, I´ve been doing a lot of research on Wah Pedals from different guitarists such as John Mayer (he uses one on a concert playing Voodoo Child), John Frusciante, Jimi Hendrix, and Stevie Ray Vaughan. 2 of them used Vox Wah´s and I´ve been thinking about getting a Vox but I'm not sure about which one. The WH10 is very expensive and there´s 1% that I get it so it goes out of the equation. John Mayer, I don´t see which one he uses so if anyone knows can u please let me know? Tell me guys, what is the difference between V845 and V847. If you have other options that can suit the type of songs I play, which are the guitarists I mentioned above, It´ll be greatly appreciated. Thanks in advance.