Hello. I have a Dunlop UV-1 and I want to add an expression pedal to it. http://milas.spb.ru/~kmg/files/schematics/Dunlop/Dunlop%20-%20Univibe%20UV-1%20-%20Schematic%20(2-2).pdf Would this one work for this unit? https://www.strymon.net/strymon-tech-corner-2-build-your-own-expression-pedal/ Thanks for any help with this.