A self-adjusting blade for engagement with a moving work surface, comprising a steel strip elongated in a first direction between first and second sides, said strip having an edge section along said first side for contact with said work surface, and said edge section being hardened to a hardness exceeding that of the remaining part of said strip. This orientation of the light source provides a compact construction of the reading lamp. A Fast Fourier Transform block is downstream from the FIR filter and has a length N so that filter transition regions occur between frequency bins of the FFT block. The floating heelblock and locking mechanism are interconvertible for different ski modes: in fixed heel-mode\u2014the locking arms act to firmly secure the heel to the ski for aggressive downhill conditions or riding style, and in free heel mode\u2014the locking arms may be configured to support touring and climbing configurations. Since it does not require power to operate, the cutoff fuse is suitable for monitoring e long-term storage condition. The conductive nano-particle layer at the bottom of the contact prevents the second conductive layer from peeling off and costs much less to produce.