A system and method for performing power conservation actions is described. An interface structure provides a substantially rigid connection between the load wheel assembly and a mounting structure on the materials handling vehicle. The present invention also relates to a gas- or oil-fired boiler, especially for domestic application, with high efficiency, space saving and reduced weight. A second set of payouts for the set of outcomes is determined. For example, the relay service can be implemented on a server connected to the network and can use HTTP to relay data such as control data via messages from one device to another.