Foam sponge cutting apparatus with both vertical and horizontal cutting devices. The thermal vias are provided in addition to data-carrying through vias, which communicate data signals between circuit layers, and power-carrying through vias, which are coupled to a power distribution network for the circuit layers, such that the thermal conductivity is increased above that which may be provided by the data-carrying and power-carrying through vias in the stack. That subset of components is limited to those components that receive stimuli from sources external to the routing engine. A plurality of support walls extends from the diametrically opposite side of the piston body toward the securement features. In some embodiments, the sample data generated by each RF channel is buffered and an arbiter picks one burst at a time for application to the input of a CMTS receiver or doles out bursts to different receivers.