An implement having an engine and a transaxle which may be rigidly and directly attached to one another in a vertically stacked orientation to form an engine and transaxle module. The chair cover protects chairs from staining and other damage and includes a back cover and a seat cover. A pre-PCR ultrafiltration step can be used to effectively decontaminate or remove background DNA. Assigning each DSP core to NK antennas having a similar property and a same tier, the selection of N out of M using a predefined criterion is reduced to selecting NK out of MK which reduces the computation complexity by a factor of K, where K is a number of the DSP cores. When the scan enable signal is asserted, the scan chain cells may be connected to form a scan chain for test data loading and unloading.