A golf club head includes a portion with different thickness in a face portion. The electronic circuit comprises a compensation network electrically connected between ground and a source potential and an inverting amplification stage electrically connected to the output of the compensation network. The clip is bent from an elongated thread or rod of wire or suitable wirelike material. The present system can extract data from completed forms. The integration of catalysts is proposed to accommodate both upright dielectric and upright conducting nanotube fabrication in the same layer.