The invention relates to an improved pet transport system. 5 by weight of a natural rubber latex; from 20 to 64. Then, a high speed image processor processes the 3-D data to find the locations of the leads and the solder paste. A third aspect is a critical signal propagation path in a programmable logic device comprising global non-overlapping control signals and time multiplexed wires, wherein each control signal assigns a programmable time slot for multiple signals within one of said wires, further comprising one or more critical signals assigned to the last multiplexed time slot. The temperature compensating attenuator includes a temperature compensating circuit that compensates for variations in operation of the attenuation circuit due to a temperature change. Also a method of assembling a brake disk from a core and friction elements.