A clock generator having a delay locked loop and a delay control circuit. The aligned Pb-free solder joints and Pb-containing solders are heated to a temperature above a melting point of the Pb-free solder joint for a sufficient time to allow complete melting of both the Pb-free solder joints and Pb-containing solder paste and the homogenous mixing thereof during assembly. A plurality of toe cushion members are mounted for independent movement within openings contained in the toe plate, and a stabilizing arch cushion member is mounted in the recess defined in the heel plate.