Case compatibility has been and remains the single biggest issue with Lightning-based docks. Belkin's new Express Dock for iPad ($60) attempts to solve that problem with a unique, adjustable Lightning plug. Although it still has a wide, Dock Connector-sized base around it, the plug raises and lowers as you turn a dial on the back of the dock. Because most fourth-generation iPad cases also fit prior models, the openings should be large enough for this…
