Yeah, that came from an interview with Percy, straight from the horses mouth. I had to dig into my memory trough for that
More funny info... Percy built his own flangery wah type thing before they were an effect, and it was well strange. It used to get so hot, he had to use a Peltior system to cool it down, but the sound kep changing depending on how hot it got. He was a bit of an amateur ( but a bloody good one ) lectronix hobbyist
It can be heard on early Brand X where wah is involved. I might even remember which track (s) if i rack my walnut