A method for deriving a hierarchical functional description of a circuit by creating a hierarchical model of the circuit from the initial hardware description, the hierarchical model having at least one boundary connection coupling hierarchical levels of the model. When each of the tumbler discs is rotated to an unlocking orientation, the locking member is movable from a locking position to a releasing position. The first and second opposing arms each comprise a plurality of telescoping chain-links. The present invention can also be viewed as a method for providing remote monitoring of a power device. Upper links can be connected to the airlift box and to a bearing housing. The alloy material may be consolidated.