The PCI-CardBox from IBP Instruments plugs into a notebook's PC Card slot. Most magazine reviews ignore them. Docking stations require AC power so you cannot work on LD2000 on an airplane. LD2000 requires the QM2000 board which in turn means the docking station must be used. Some newer docking stations, such as the IBM SelectaDock III have dual-capable slots that can run either older ISA or newer PCI bus cards.
Most docking stations are fairly large.
They can be the size of a desktop computer. They may barely fit into a luggage bag meeting airlines' overhead bin restrictions. The big portability savings is in not having to carry a computer monitor, and in being able to undock the computer to work on non-LD applications. These are micro-docking stations, which just duplicate the ports on a notebook making it faster to hook up to a desktop configuration. Port replicators have no slots or bays, so they are useless for LD2000's needs.