Toppobrillo Triple Wavefolder DIY with Grayscale panel
The Triple Wavefolder module contains three independent, voltage-controlled waveshapers that were designed to accomplish simple but useful waveshaping tasks, as well as combine to produce a nearly infinite variety of complex non-linear synthesis functions such as those implemented by the Buchla and Serge modular systems in the 70's.
http://www.toppobrillo.com/TWF/TWF.html
TWF PCBs for DIY builders will soon be available. This panel will also fit the original factory-built TWF if an even-width panel is preferred.
http://grayscale.info/panels/toppobrillo-triple-wavefolder-diy/
No info about availability.