I have long been a fan of the Cusack Tap-A-Whirl. Every trem sound I ever wanted was in the TAW. In fact, I felt the sine wave sounded so close to my vintage 1965 BFDR that I had a hard time believing my ears. I recently sent my TAW in for the 24-wave-form upgrade. It is so worth it. The 24 wave forms make the pedal even better. I can't imagine a way to improve this pedal. A stereo panning version perhaps? Just ideas for Jon... I really wanted to take a moment to publicly praise Jon. After receiving my upgrade I found I needed a quick fix for the gain with the new internal trimmer having been replaced. Jon graciously fixed and retuned the pedal to me inside of a holiday week's time. Great service, nice guy, awesome pedal! Kudos!