The Quaverato harmonic tremolo now sports a CLICK SUPPRESSION circuit for SILENT SWITCHING. Also, MIDI implementation is now incorporated into the main circuit board: MIDI is easier than ever to implement for kit builders who choose that option. MIDI is included standard on all ready-to-play units.
These features appear in units with serial numbers ZD3672 and higher, which began shipping on June 10, 2019. Kits in this series have their own new assembly manual.