This invention concerns a machine for the drying, polishing and burnishing cutlery and other metal tableware. A service processor includes a battery-backed hardware clock, and a hypervisor includes a hypervisor system clock. The locking taper secures the adjustment of the knuckle halves, even if the knuckle screw becomes loosened. With different densities and thicknesses of the first and second pillars, a contact strength can be generated when the pillars interconnecting with each other, such that the pillars are connected closely. Additional capabilities enhancing the learning process include digital recording and playback of the actual performance, andor accompaniment by synthesis or playback of digital recording of other performance parts. Components can be easily replaced through a service opening.