In a converter system having a voltage intermediate circuit which operates with a mains system input inductor in the step-up controller mode or has other input-side inductances, there is a risk of natural system oscillations being formed via discharge capacitances in conjunction with motors. The slide includes a sheet of material having an upturn perimeter edge and it is secured to the sole of an athletic shoe or a two piece strap is secured to opposite perimeter edges for securing ones foot to the upper surface of the slide. The suction cup is attached to an arm for manipulating the device. Advantageously, this size increase is obtained by modifying the size of the apertures of the projection stencil level closest to the substrate to be etched.