Thanks very much for the informative response. I've been reading (thank you Internet!) about how different kinds of amplifiers (tubes, FETs, etc) and different circuit topologies behave when they clip, and I was curious how you modelled this with the distortion module curves. I've also been trying to add integral harmonics in different ratios to alter the waveform as well. I'm trying to end up with a more of a triangle waveform than the square wave you get with classic clipping.