The gas exhaust comprises a generally cylindrical shaped casing closed by a bottom at one end and with openings to allow gas to escape. Some embodiments comprise a system that includes a configurable device located within a support structure and logic that is adapted to determine the location of the configurable device within the support structure and to inform the configurable device of its location. The modified aluminoxanes are effective activators for single-site catalysts. Additionally, a first space section is formed between the first and second adsorption layers. In one embodiment, the sensor unit adjusts one or more of the thresholds based on ambient temperature. Another embodiment provides a method that includes providing power to a haptic device configured to cause the haptic device to provide a haptic sensation above a pre-determined sensation threshold.