A vehicle steering mechanism includes an electrical power assist device connected with the steering shaft by an adjustable coupling, thereby to permit accurate perfect alignment between the output shaft of the power assist device and the steering shaft on the steering axis of the mechanism. The dual-circuit power supply line includes a bypass line and a charge-up line arranged in parallel with the bypass line. The browser is loaded on the computer and is configured to establish an on-line session with another computer when the browser is enabled. The valley removal mechanism preferably includes a support surface that contacts a bottom of the stack, a ramp defining a ramp profile, and a ramp follower that guides the support surface to a variable orientation that compensates for the valley as the stack height changes.