A wireless opportunistic network that can facilitate data transfer by way of interconnected devices is disclosed. The server is constructed with system control section, LANWAN communication control section, request processing section, printer information storing section, protocol processing section, and printer state acquiring section. The first birefringent wedge has a first optical axis substantially perpendicular to the rotation axis. A device may be coupled to the container for evacuating the particles or the waste water from the container. A radial shoulder, for example, machined on the spindle’s outboard end proximate to the outboard flange, axially supports the inner race of a bearing assembly, thereby advantageously reducing wheelend run-out.