No not at all! All it took was the extra hardware such as the light dependent resistor, a DPDT switch, and a 1/4'' switched stereo jack. I'll make a diagram soon and post a link.
Hello, I can't quite read what you wrote, sorry! I like the sound too, made the pedal much more enjoyable, were you asking how to perform the modification?
+Greg Yankou This is critical! White socks are too linear and dull sounding when it comes to sweeping the filter, whereas black socks are logarithmic in nature thus closer to the original ICAR taper in wah wahs.