This unit was fully tested. The 2 arpeggiator knobs were replaced with original Dave Smith Instrument Poly Evolver knobs. The envelope release fader is broken - the shaft wobbles but the fader still works. We recommend being very gentle with it or, preferably, replacing it. We contacted Novation for the part but they weren’t very helpful. It’s possible they used a generic part that’s still available, or there’s a chance this fader may be repairable (not sure about this though). All encoders, switches, keys and other sliders are working well and feel fine. Sounds great.